64722862680 has 256 divisors, whose sum is σ = 230880706560. Its totient is φ = 14203123200.

The previous prime is 64722862667. The next prime is 64722862691. The reversal of 64722862680 is 8626822746.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3297295 + ... + 3316865.

It is an arithmetic number, because the mean of its divisors is an integer number (901877760).

Almost surely, 2^64722862680 is an apocalyptic number.

64722862680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64722862680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115440353280).

64722862680 is an abundant number, since it is smaller than the sum of its proper divisors (166157843880).

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

64722862680 is a wasteful number, since it uses less digits than its factorization.

64722862680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19750 (or 19746 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 51.

The spelling of 64722862680 in words is "sixty-four billion, seven hundred twenty-two million, eight hundred sixty-two thousand, six hundred eighty".