64860440260 has 48 divisors (see below), whose sum is σ = 169816429440. Its totient is φ = 20216240640.

The previous prime is 64860440257. The next prime is 64860440263. The reversal of 64860440260 is 6204406846.

It is an interprime number because it is at equal distance from previous prime (64860440257) and next prime (64860440263).

It is not an unprimeable number, because it can be changed into a prime (64860440263) 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, 21057045 + ... + 21060124.

It is an arithmetic number, because the mean of its divisors is an integer number (3537842280).

Almost surely, 2^64860440260 is an apocalyptic number.

It is an amenable number.

64860440260 is an abundant number, since it is smaller than the sum of its proper divisors (104955989180).

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

64860440260 is a wasteful number, since it uses less digits than its factorization.

64860440260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42117196 (or 42117194 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 64860440260 in words is "sixty-four billion, eight hundred sixty million, four hundred forty thousand, two hundred sixty".