1901278397200 has 480 divisors, whose sum is σ = 5833137766400. Its totient is φ = 579318220800.

The previous prime is 1901278397191. The next prime is 1901278397233. The reversal of 1901278397200 is 27938721091.

It is a super-2 number, since 2×1901278397200² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 224547367 + ... + 224555833.

Almost surely, 2^{1901278397200} is an apocalyptic number.

1901278397200 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 1901278397200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2916568883200).

1901278397200 is an abundant number, since it is smaller than the sum of its proper divisors (3931859369200).

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

1901278397200 is a wasteful number, since it uses less digits than its factorization.

1901278397200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8735 (or 8724 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 1901278397200 in words is "one trillion, nine hundred one billion, two hundred seventy-eight million, three hundred ninety-seven thousand, two hundred".