78524649513 has 6 divisors (see below), whose sum is σ = 113424493754. Its totient is φ = 52349766336.

The previous prime is 78524649443. The next prime is 78524649523. The reversal of 78524649513 is 31594642587.

It is a happy number.

78524649513 is a `hidden beast` number, since 7 + 8 + 524 + 64 + 9 + 51 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 71981133849 + 6543515664 = 268293^2 + 80892^2 .

It is not a de Polignac number, because 78524649513 - 2¹⁴ = 78524633129 is a prime.

It is a super-2 number, since 2×78524649513² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78524649513.

It is not an unprimeable number, because it can be changed into a prime (78524649523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4362480520 + ... + 4362480537.

Almost surely, 2^78524649513 is an apocalyptic number.

It is an amenable number.

78524649513 is a deficient number, since it is larger than the sum of its proper divisors (34899844241).

78524649513 is a wasteful number, since it uses less digits than its factorization.

78524649513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8724961063 (or 8724961060 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 78524649513 in words is "seventy-eight billion, five hundred twenty-four million, six hundred forty-nine thousand, five hundred thirteen".