64624630420 has 48 divisors (see below), whose sum is σ = 161842560768. Its totient is φ = 21193666560.

The previous prime is 64624630393. The next prime is 64624630423. The reversal of 64624630420 is 2403642646.

It is a self number, because there is not a number n which added to its sum of digits gives 64624630420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64624630423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10031661 + ... + 10038100.

It is an arithmetic number, because the mean of its divisors is an integer number (3371720016).

Almost surely, 2^64624630420 is an apocalyptic number.

It is an amenable number.

64624630420 is an abundant number, since it is smaller than the sum of its proper divisors (97217930348).

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

64624630420 is a wasteful number, since it uses less digits than its factorization.

64624630420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20069800 (or 20069798 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 37.

The spelling of 64624630420 in words is "sixty-four billion, six hundred twenty-four million, six hundred thirty thousand, four hundred twenty".