64401913777977 has 32 divisors (see below), whose sum is σ = 95574990336000. Its totient is φ = 42860480938704.

The previous prime is 64401913777889. The next prime is 64401913778009. The reversal of 64401913777977 is 77977731910446.

64401913777977 is a `hidden beast` number, since 6 + 4 + 401 + 9 + 13 + 77 + 79 + 77 = 666.

It is not a de Polignac number, because 64401913777977 - 2¹⁰ = 64401913776953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64401983777977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 308589738 + ... + 308798364.

It is an arithmetic number, because the mean of its divisors is an integer number (2986718448000).

Almost surely, 2^{64401913777977} is an apocalyptic number.

It is an amenable number.

64401913777977 is a deficient number, since it is larger than the sum of its proper divisors (31173076558023).

64401913777977 is a wasteful number, since it uses less digits than its factorization.

64401913777977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228322 (or 228316 counting only the distinct ones).

The product of its (nonzero) digits is 392073696, while the sum is 72.

The spelling of 64401913777977 in words is "sixty-four trillion, four hundred one billion, nine hundred thirteen million, seven hundred seventy-seven thousand, nine hundred seventy-seven".