77517085641 has 8 divisors (see below), whose sum is σ = 103422844800. Its totient is φ = 51644691792.

The previous prime is 77517085589. The next prime is 77517085663. The reversal of 77517085641 is 14658071577.

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

It is not a de Polignac number, because 77517085641 - 2²¹ = 77514988489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77517085691) 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, 8335905 + ... + 8345198.

It is an arithmetic number, because the mean of its divisors is an integer number (12927855600).

Almost surely, 2^77517085641 is an apocalyptic number.

It is an amenable number.

77517085641 is a deficient number, since it is larger than the sum of its proper divisors (25905759159).

77517085641 is a wasteful number, since it uses less digits than its factorization.

77517085641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16682655.

The product of its (nonzero) digits is 1646400, while the sum is 51.

The spelling of 77517085641 in words is "seventy-seven billion, five hundred seventeen million, eighty-five thousand, six hundred forty-one".