65421564 has 48 divisors (see below), whose sum is σ = 170073120. Its totient is φ = 19434240.

The previous prime is 65421529. The next prime is 65421571. The reversal of 65421564 is 46512456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2707 + ... + 11754.

It is an arithmetic number, because the mean of its divisors is an integer number (3543190).

Almost surely, 2^65421564 is an apocalyptic number.

It is an amenable number.

65421564 is an abundant number, since it is smaller than the sum of its proper divisors (104651556).

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

65421564 is a wasteful number, since it uses less digits than its factorization.

65421564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14510 (or 14508 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 65421564 is about 8088.3597842826. The cubic root of 65421564 is about 402.9399307464.

The spelling of 65421564 in words is "sixty-five million, four hundred twenty-one thousand, five hundred sixty-four".