1997194525120 has 56 divisors (see below), whose sum is σ = 4813118556624. Its totient is φ = 789252765696.

The previous prime is 1997194525097. The next prime is 1997194525171. The reversal of 1997194525120 is 215254917991.

It is a super-2 number, since 2×1997194525120² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37571229 + ... + 37624348.

It is an arithmetic number, because the mean of its divisors is an integer number (85948545654).

Almost surely, 2^{1997194525120} is an apocalyptic number.

1997194525120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1997194525120 is an abundant number, since it is smaller than the sum of its proper divisors (2815924031504).

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

1997194525120 is an equidigital number, since it uses as much as digits as its factorization.

1997194525120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75195677 (or 75195667 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 55.

The spelling of 1997194525120 in words is "one trillion, nine hundred ninety-seven billion, one hundred ninety-four million, five hundred twenty-five thousand, one hundred twenty".