77432215706 has 32 divisors (see below), whose sum is σ = 131895812160. Its totient is φ = 33869511936.

The previous prime is 77432215667. The next prime is 77432215727. The reversal of 77432215706 is 60751223477.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1096556 + ... + 1165031.

It is an arithmetic number, because the mean of its divisors is an integer number (4121744130).

Almost surely, 2^77432215706 is an apocalyptic number.

77432215706 is a deficient number, since it is larger than the sum of its proper divisors (54463596454).

77432215706 is a wasteful number, since it uses less digits than its factorization.

77432215706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261678.

The product of its (nonzero) digits is 493920, while the sum is 44.

The spelling of 77432215706 in words is "seventy-seven billion, four hundred thirty-two million, two hundred fifteen thousand, seven hundred six".