397211532478 has 16 divisors (see below), whose sum is σ = 618075380160. Its totient is φ = 191309040000.

The previous prime is 397211532461. The next prime is 397211532479. The reversal of 397211532478 is 874235112793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397211532479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30652023 + ... + 30664978.

It is an arithmetic number, because the mean of its divisors is an integer number (38629711260).

Almost surely, 2^397211532478 is an apocalyptic number.

397211532478 is a deficient number, since it is larger than the sum of its proper divisors (220863847682).

397211532478 is a wasteful number, since it uses less digits than its factorization.

397211532478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61317123.

The product of its digits is 2540160, while the sum is 52.

The spelling of 397211532478 in words is "three hundred ninety-seven billion, two hundred eleven million, five hundred thirty-two thousand, four hundred seventy-eight".