1397997967264 has 12 divisors (see below), whose sum is σ = 2752308498114. Its totient is φ = 698998983616.

The previous prime is 1397997967183. The next prime is 1397997967307. The reversal of 1397997967264 is 4627697997931.

It can be written as a sum of positive squares in only one way, i.e., 1394713760400 + 3284206864 = 1180980^2 + 57308^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21843718207 + ... + 21843718270.

Almost surely, 2^{1397997967264} is an apocalyptic number.

It is an amenable number.

1397997967264 is a deficient number, since it is larger than the sum of its proper divisors (1354310530850).

1397997967264 is an equidigital number, since it uses as much as digits as its factorization.

1397997967264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43687436487 (or 43687436479 counting only the distinct ones).

The product of its digits is 1944365472, while the sum is 79.

The spelling of 1397997967264 in words is "one trillion, three hundred ninety-seven billion, nine hundred ninety-seven million, nine hundred sixty-seven thousand, two hundred sixty-four".