78711056251 has 16 divisors (see below), whose sum is σ = 82617535296. Its totient is φ = 74845495296.

The previous prime is 78711056239. The next prime is 78711056269. The reversal of 78711056251 is 15265011787.

It is a cyclic number.

It is not a de Polignac number, because 78711056251 - 2²⁷ = 78576838523 is a prime.

It is a super-2 number, since 2×78711056251² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78711056198 and 78711056207.

It is not an unprimeable number, because it can be changed into a prime (78711056201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7154611 + ... + 7165603.

It is an arithmetic number, because the mean of its divisors is an integer number (5163595956).

Almost surely, 2^78711056251 is an apocalyptic number.

78711056251 is a deficient number, since it is larger than the sum of its proper divisors (3906479045).

78711056251 is a wasteful number, since it uses less digits than its factorization.

78711056251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12822.

The product of its (nonzero) digits is 117600, while the sum is 43.

The spelling of 78711056251 in words is "seventy-eight billion, seven hundred eleven million, fifty-six thousand, two hundred fifty-one".