78264655646287 has 32 divisors (see below), whose sum is σ = 91955560967424. Its totient is φ = 65821783104000.

The previous prime is 78264655646279. The next prime is 78264655646347.

78264655646287 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78264655646287 - 2³ = 78264655646279 is a prime.

It is a super-2 number, since 2×78264655646287² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78264655646237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9740589 + ... + 15855862.

It is an arithmetic number, because the mean of its divisors is an integer number (2873611280232).

Almost surely, 2^{78264655646287} is an apocalyptic number.

78264655646287 is a deficient number, since it is larger than the sum of its proper divisors (13690905321137).

78264655646287 is a wasteful number, since it uses less digits than its factorization.

78264655646287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25596759.

The product of its digits is 6502809600, while the sum is 76.

The spelling of 78264655646287 in words is "seventy-eight trillion, two hundred sixty-four billion, six hundred fifty-five million, six hundred forty-six thousand, two hundred eighty-seven".