64265237621 has 32 divisors (see below), whose sum is σ = 70576652160. Its totient is φ = 58164019200.

The previous prime is 64265237573. The next prime is 64265237669. The reversal of 64265237621 is 12673256246.

It is an interprime number because it is at equal distance from previous prime (64265237573) and next prime (64265237669).

It is a cyclic number.

It is not a de Polignac number, because 64265237621 - 2⁶ = 64265237557 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 (64265237671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100257461 + ... + 100258101.

It is an arithmetic number, because the mean of its divisors is an integer number (2205520380).

Almost surely, 2^64265237621 is an apocalyptic number.

It is an amenable number.

64265237621 is a deficient number, since it is larger than the sum of its proper divisors (6311414539).

64265237621 is a wasteful number, since it uses less digits than its factorization.

64265237621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397.

The product of its digits is 725760, while the sum is 44.

The spelling of 64265237621 in words is "sixty-four billion, two hundred sixty-five million, two hundred thirty-seven thousand, six hundred twenty-one".