264641620440 has 64 divisors (see below), whose sum is σ = 793961948160. Its totient is φ = 70567802240.

The previous prime is 264641620433. The next prime is 264641620447. The reversal of 264641620440 is 44026146462.

It is an interprime number because it is at equal distance from previous prime (264641620433) and next prime (264641620447).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264641620447) 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, 3605305 + ... + 3677975.

It is an arithmetic number, because the mean of its divisors is an integer number (12405655440).

Almost surely, 2^264641620440 is an apocalyptic number.

264641620440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

264641620440 is an abundant number, since it is smaller than the sum of its proper divisors (529320327720).

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

264641620440 is a wasteful number, since it uses less digits than its factorization.

264641620440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103032 (or 103028 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 39.

The spelling of 264641620440 in words is "two hundred sixty-four billion, six hundred forty-one million, six hundred twenty thousand, four hundred forty".