77961064 has 16 divisors (see below), whose sum is σ = 149577120. Its totient is φ = 38073840.

The previous prime is 77961061. The next prime is 77961089. The reversal of 77961064 is 46016977.

It is not an unprimeable number, because it can be changed into a prime (77961061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112972 + ... + 113659.

It is an arithmetic number, because the mean of its divisors is an integer number (9348570).

Almost surely, 2^77961064 is an apocalyptic number.

It is an amenable number.

77961064 is a deficient number, since it is larger than the sum of its proper divisors (71616056).

77961064 is a wasteful number, since it uses less digits than its factorization.

77961064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226680 (or 226676 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 77961064 is about 8829.5562742416. The cubic root of 77961064 is about 427.1947622179.

The spelling of 77961064 in words is "seventy-seven million, nine hundred sixty-one thousand, sixty-four".