1625481900 has 648 divisors, whose sum is σ = 6483335040. Its totient is φ = 338688000.

The previous prime is 1625481883. The next prime is 1625481937. The reversal of 1625481900 is 91845261.

It is a super-2 number, since 2×1625481900² = 5284382814455220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 39645880 + ... + 39645920.

Almost surely, 2^1625481900 is an apocalyptic number.

1625481900 is a gapful number since it is divisible by the number (10) 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 1625481900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3241667520).

1625481900 is an abundant number, since it is smaller than the sum of its proper divisors (4857853140).

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

1625481900 is a wasteful number, since it uses less digits than its factorization.

1625481900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1625481900 is about 40317.2655322754. The cubic root of 1625481900 is about 1175.7835485984.

The spelling of 1625481900 in words is "one billion, six hundred twenty-five million, four hundred eighty-one thousand, nine hundred".