77432215705 has 32 divisors (see below), whose sum is σ = 101312870400. Its totient is φ = 56470874112.

The previous prime is 77432215667. The next prime is 77432215727. The reversal of 77432215705 is 50751223477.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77432215705 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3007276 + ... + 3032914.

It is an arithmetic number, because the mean of its divisors is an integer number (3166027200).

Almost surely, 2^77432215705 is an apocalyptic number.

It is an amenable number.

77432215705 is a deficient number, since it is larger than the sum of its proper divisors (23880654695).

77432215705 is a wasteful number, since it uses less digits than its factorization.

77432215705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26233.

The product of its (nonzero) digits is 411600, while the sum is 43.

The spelling of 77432215705 in words is "seventy-seven billion, four hundred thirty-two million, two hundred fifteen thousand, seven hundred five".