1997487230976 has 156 divisors (see below), whose sum is σ = 6020678303328. Its totient is φ = 636879716352.

The previous prime is 1997487230939. The next prime is 1997487231007. The reversal of 1997487230976 is 6790327847991.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330070 + ... + 2025813.

It is an arithmetic number, because the mean of its divisors is an integer number (38594091688).

Almost surely, 2^{1997487230976} is an apocalyptic number.

1997487230976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1997487230976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3010339151664).

1997487230976 is an abundant number, since it is smaller than the sum of its proper divisors (4023191072352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1997487230976 is a wasteful number, since it uses less digits than its factorization.

1997487230976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355936 (or 2355911 counting only the distinct ones).

The product of its (nonzero) digits is 288054144, while the sum is 72.

The spelling of 1997487230976 in words is "one trillion, nine hundred ninety-seven billion, four hundred eighty-seven million, two hundred thirty thousand, nine hundred seventy-six".