77697401705 has 32 divisors (see below), whose sum is σ = 117394368768. Its totient is φ = 47955168000.

The previous prime is 77697401701. The next prime is 77697401731. The reversal of 77697401705 is 50710479677.

It is not a de Polignac number, because 77697401705 - 2² = 77697401701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77697401701) 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, 960182 + ... + 1037951.

It is an arithmetic number, because the mean of its divisors is an integer number (3668574024).

Almost surely, 2^77697401705 is an apocalyptic number.

It is an amenable number.

77697401705 is a deficient number, since it is larger than the sum of its proper divisors (39696967063).

77697401705 is a wasteful number, since it uses less digits than its factorization.

77697401705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998257.

The product of its (nonzero) digits is 2593080, while the sum is 53.

The spelling of 77697401705 in words is "seventy-seven billion, six hundred ninety-seven million, four hundred one thousand, seven hundred five".