64651023 has 12 divisors (see below), whose sum is σ = 93457000. Its totient is φ = 43067376.

The previous prime is 64651007. The next prime is 64651057. The reversal of 64651023 is 32015646.

64651023 is a `hidden beast` number, since 6 + 4 + 651 + 0 + 2 + 3 = 666.

It is not a de Polignac number, because 64651023 - 2⁴ = 64651007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64651003) 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, 16728 + ... + 20226.

Almost surely, 2^64651023 is an apocalyptic number.

64651023 is a deficient number, since it is larger than the sum of its proper divisors (28805977).

64651023 is a wasteful number, since it uses less digits than its factorization.

64651023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5558 (or 5555 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 64651023 is about 8040.5859861082. The cubic root of 64651023 is about 401.3517248709.

Adding to 64651023 its reverse (32015646), we get a palindrome (96666669).

The spelling of 64651023 in words is "sixty-four million, six hundred fifty-one thousand, twenty-three".