77688650953 has 16 divisors (see below), whose sum is σ = 80657280000. Its totient is φ = 74768121792.

The previous prime is 77688650933. The next prime is 77688650957. The reversal of 77688650953 is 35905688677.

It is a cyclic number.

It is not a de Polignac number, because 77688650953 - 2³³ = 69098716361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77688650957) 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, 2399688 + ... + 2431846.

It is an arithmetic number, because the mean of its divisors is an integer number (5041080000).

Almost surely, 2^77688650953 is an apocalyptic number.

It is an amenable number.

77688650953 is a deficient number, since it is larger than the sum of its proper divisors (2968629047).

77688650953 is a wasteful number, since it uses less digits than its factorization.

77688650953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32904.

The product of its (nonzero) digits is 76204800, while the sum is 64.

The spelling of 77688650953 in words is "seventy-seven billion, six hundred eighty-eight million, six hundred fifty thousand, nine hundred fifty-three".