1256164321516 has 24 divisors (see below), whose sum is σ = 2431370031440. Its totient is φ = 564098738112.

The previous prime is 1256164321501. The next prime is 1256164321519. The reversal of 1256164321516 is 6151234616521.

It is not an unprimeable number, because it can be changed into a prime (1256164321519) 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, 326444106 + ... + 326447953.

Almost surely, 2^{1256164321516} is an apocalyptic number.

It is an amenable number.

1256164321516 is a deficient number, since it is larger than the sum of its proper divisors (1175205709924).

1256164321516 is a wasteful number, since it uses less digits than its factorization.

1256164321516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652892113 (or 652892111 counting only the distinct ones).

The product of its digits is 259200, while the sum is 43.

The spelling of 1256164321516 in words is "one trillion, two hundred fifty-six billion, one hundred sixty-four million, three hundred twenty-one thousand, five hundred sixteen".