64405936077 has 32 divisors (see below), whose sum is σ = 98993832960. Its totient is φ = 36484680960.

The previous prime is 64405936061. The next prime is 64405936087. The reversal of 64405936077 is 77063950446.

It is not a de Polignac number, because 64405936077 - 2⁴ = 64405936061 is a prime.

It is a super-2 number, since 2×64405936077² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64405936087) 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, 2764158 + ... + 2787360.

It is an arithmetic number, because the mean of its divisors is an integer number (3093557280).

Almost surely, 2^64405936077 is an apocalyptic number.

It is an amenable number.

64405936077 is a deficient number, since it is larger than the sum of its proper divisors (34587896883).

64405936077 is a wasteful number, since it uses less digits than its factorization.

64405936077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24353.

The product of its (nonzero) digits is 3810240, while the sum is 51.

The spelling of 64405936077 in words is "sixty-four billion, four hundred five million, nine hundred thirty-six thousand, seventy-seven".