63947456397 has 16 divisors (see below), whose sum is σ = 103349424960. Its totient is φ = 38756034000.

The previous prime is 63947456389. The next prime is 63947456429. The reversal of 63947456397 is 79365474936.

63947456397 is a `hidden beast` number, since 6 + 3 + 94 + 7 + 456 + 3 + 97 = 666.

It is not a de Polignac number, because 63947456397 - 2³ = 63947456389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63947456317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107655354 + ... + 107655947.

It is an arithmetic number, because the mean of its divisors is an integer number (6459339060).

Almost surely, 2^63947456397 is an apocalyptic number.

It is an amenable number.

63947456397 is a deficient number, since it is larger than the sum of its proper divisors (39401968563).

63947456397 is a wasteful number, since it uses less digits than its factorization.

63947456397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215311321 (or 215311315 counting only the distinct ones).

The product of its digits is 102876480, while the sum is 63.

The spelling of 63947456397 in words is "sixty-three billion, nine hundred forty-seven million, four hundred fifty-six thousand, three hundred ninety-seven".