77638173953 has 8 divisors (see below), whose sum is σ = 82295377920. Its totient is φ = 72990998080.

The previous prime is 77638173931. The next prime is 77638173973. The reversal of 77638173953 is 35937183677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77638173953 - 2²⁴ = 77621396737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77638173892 and 77638173901.

It is not an unprimeable number, because it can be changed into a prime (77638173923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2491073 + ... + 2522046.

It is an arithmetic number, because the mean of its divisors is an integer number (10286922240).

Almost surely, 2^77638173953 is an apocalyptic number.

It is an amenable number.

77638173953 is a deficient number, since it is larger than the sum of its proper divisors (4657203967).

77638173953 is a wasteful number, since it uses less digits than its factorization.

77638173953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5014047.

The product of its digits is 20003760, while the sum is 59.

The spelling of 77638173953 in words is "seventy-seven billion, six hundred thirty-eight million, one hundred seventy-three thousand, nine hundred fifty-three".