64769621 has 12 divisors (see below), whose sum is σ = 75540960. Its totient is φ = 55371960.

The previous prime is 64769611. The next prime is 64769623. The reversal of 64769621 is 12696746.

It is not a de Polignac number, because 64769621 - 2¹⁸ = 64507477 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 (64769623) 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, 20006 + ... + 23016.

It is an arithmetic number, because the mean of its divisors is an integer number (6295080).

Almost surely, 2^64769621 is an apocalyptic number.

It is an amenable number.

64769621 is a deficient number, since it is larger than the sum of its proper divisors (10771339).

64769621 is a wasteful number, since it uses less digits than its factorization.

64769621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3464 (or 3457 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 64769621 is about 8047.9575669856. The cubic root of 64769621 is about 401.5969926343.

The spelling of 64769621 in words is "sixty-four million, seven hundred sixty-nine thousand, six hundred twenty-one".