609721470864 has 480 divisors, whose sum is σ = 2059424759808. Its totient is φ = 166396032000.

The previous prime is 609721470829. The next prime is 609721470899. The reversal of 609721470864 is 468074127906.

609721470864 is a `hidden beast` number, since 6 + 0 + 97 + 2 + 1 + 470 + 86 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (609721470829) and next prime (609721470899).

It is a self number, because there is not a number n which added to its sum of digits gives 609721470864.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 41780209 + ... + 41794799.

Almost surely, 2^609721470864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609721470864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1029712379904).

609721470864 is an abundant number, since it is smaller than the sum of its proper divisors (1449703288944).

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

609721470864 is a wasteful number, since it uses less digits than its factorization.

609721470864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14707 (or 14698 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 609721470864 in words is "six hundred nine billion, seven hundred twenty-one million, four hundred seventy thousand, eight hundred sixty-four".