64641654 has 48 divisors (see below), whose sum is σ = 174620160. Its totient is φ = 16789680.

The previous prime is 64641653. The next prime is 64641659. The reversal of 64641654 is 45614646.

64641654 is a `hidden beast` number, since 6 + 4 + 641 + 6 + 5 + 4 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64641653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21934 + ... + 24705.

It is an arithmetic number, because the mean of its divisors is an integer number (3637920).

Almost surely, 2^64641654 is an apocalyptic number.

64641654 is an abundant number, since it is smaller than the sum of its proper divisors (109978506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64641654 is a wasteful number, since it uses less digits than its factorization.

64641654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46665 (or 46662 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 64641654 is about 8040.0033582083. The cubic root of 64641654 is about 401.3323364385.

It can be divided in two parts, 6464 and 1654, that added together give a palindrome (8118).

The spelling of 64641654 in words is "sixty-four million, six hundred forty-one thousand, six hundred fifty-four".