78607766561256 has 64 divisors (see below), whose sum is σ = 218445249859200. Its totient is φ = 26191747724544.

The previous prime is 78607766561213. The next prime is 78607766561257. The reversal of 78607766561256 is 65216566770687.

It is a happy number.

78607766561256 is a `hidden beast` number, since 7 + 8 + 6 + 0 + 7 + 7 + 6 + 6 + 561 + 2 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (78607766561257) 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, 74762340 + ... + 75806483.

It is an arithmetic number, because the mean of its divisors is an integer number (3413207029050).

Almost surely, 2^{78607766561256} is an apocalyptic number.

It is an amenable number.

78607766561256 is an abundant number, since it is smaller than the sum of its proper divisors (139837483297944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78607766561256 is a wasteful number, since it uses less digits than its factorization.

78607766561256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150571255 (or 150571245 counting only the distinct ones).

The product of its (nonzero) digits is 1066867200, while the sum is 72.

The spelling of 78607766561256 in words is "seventy-eight trillion, six hundred seven billion, seven hundred sixty-six million, five hundred sixty-one thousand, two hundred fifty-six".