77864718722 has 16 divisors (see below), whose sum is σ = 133490394240. Its totient is φ = 33368588928.

The previous prime is 77864718697. The next prime is 77864718731. The reversal of 77864718722 is 22781746877.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87683 + ... + 404249.

It is an arithmetic number, because the mean of its divisors is an integer number (8343149640).

Almost surely, 2^77864718722 is an apocalyptic number.

77864718722 is a deficient number, since it is larger than the sum of its proper divisors (55625675518).

77864718722 is a wasteful number, since it uses less digits than its factorization.

77864718722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334145.

The product of its digits is 14751744, while the sum is 59.

The spelling of 77864718722 in words is "seventy-seven billion, eight hundred sixty-four million, seven hundred eighteen thousand, seven hundred twenty-two".