397178643575 has 24 divisors (see below), whose sum is σ = 564634536672. Its totient is φ = 271491880320.

The previous prime is 397178643551. The next prime is 397178643581. The reversal of 397178643575 is 575346871793.

It is not a de Polignac number, because 397178643575 - 2²⁰ = 397177594999 is a prime.

It is a Duffinian number.

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, 3524324 + ... + 3635273.

It is an arithmetic number, because the mean of its divisors is an integer number (23526439028).

Almost surely, 2^397178643575 is an apocalyptic number.

397178643575 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

397178643575 is a deficient number, since it is larger than the sum of its proper divisors (167455893097).

397178643575 is a wasteful number, since it uses less digits than its factorization.

397178643575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7159931 (or 7159926 counting only the distinct ones).

The product of its digits is 133358400, while the sum is 65.

The spelling of 397178643575 in words is "three hundred ninety-seven billion, one hundred seventy-eight million, six hundred forty-three thousand, five hundred seventy-five".