397681828525 has 24 divisors (see below), whose sum is σ = 501547764960. Its totient is φ = 312713106240.

The previous prime is 397681828483. The next prime is 397681828541. The reversal of 397681828525 is 525828186793.

It is a de Polignac number, because none of the positive numbers 2^k-397681828525 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17575119 + ... + 17597731.

It is an arithmetic number, because the mean of its divisors is an integer number (20897823540).

Almost surely, 2^397681828525 is an apocalyptic number.

It is an amenable number.

397681828525 is a deficient number, since it is larger than the sum of its proper divisors (103865936435).

397681828525 is a wasteful number, since it uses less digits than its factorization.

397681828525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34605 (or 34600 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 64.

The spelling of 397681828525 in words is "three hundred ninety-seven billion, six hundred eighty-one million, eight hundred twenty-eight thousand, five hundred twenty-five".