78269612913 has 24 divisors (see below), whose sum is σ = 116728335360. Its totient is φ = 50485596480.

The previous prime is 78269612903. The next prime is 78269612983. The reversal of 78269612913 is 31921696287.

78269612913 is a `hidden beast` number, since 7 + 8 + 2 + 6 + 9 + 612 + 9 + 13 = 666.

It is not a de Polignac number, because 78269612913 - 2⁶ = 78269612849 is a prime.

It is a super-2 number, since 2×78269612913² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78269612913.

It is not an unprimeable number, because it can be changed into a prime (78269612903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1378045 + ... + 1433717.

It is an arithmetic number, because the mean of its divisors is an integer number (4863680640).

Almost surely, 2^78269612913 is an apocalyptic number.

It is an amenable number.

78269612913 is a deficient number, since it is larger than the sum of its proper divisors (38458722447).

78269612913 is a wasteful number, since it uses less digits than its factorization.

78269612913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60749 (or 60746 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 78269612913 in words is "seventy-eight billion, two hundred sixty-nine million, six hundred twelve thousand, nine hundred thirteen".