64109623077 has 12 divisors (see below), whose sum is σ = 93018050944. Its totient is φ = 42548089320.

The previous prime is 64109623009. The next prime is 64109623087. The reversal of 64109623077 is 77032690146.

64109623077 is a `hidden beast` number, since 6 + 4 + 10 + 9 + 623 + 0 + 7 + 7 = 666.

It is not a de Polignac number, because 64109623077 - 2¹² = 64109618981 is a prime.

It is a super-2 number, since 2×64109623077² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64109623007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15969499 + ... + 15973512.

Almost surely, 2^64109623077 is an apocalyptic number.

It is an amenable number.

64109623077 is a deficient number, since it is larger than the sum of its proper divisors (28908427867).

64109623077 is a wasteful number, since it uses less digits than its factorization.

64109623077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31943240 (or 31943237 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The spelling of 64109623077 in words is "sixty-four billion, one hundred nine million, six hundred twenty-three thousand, seventy-seven".