655909740164 has 72 divisors (see below), whose sum is σ = 1393853365632. Its totient is φ = 264506204160.

The previous prime is 655909740137. The next prime is 655909740173. The reversal of 655909740164 is 461047909556.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51272609 + ... + 51285399.

Almost surely, 2^655909740164 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 655909740164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (696926682816).

655909740164 is an abundant number, since it is smaller than the sum of its proper divisors (737943625468).

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

655909740164 is a wasteful number, since it uses less digits than its factorization.

655909740164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19173 (or 19154 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 56.

The spelling of 655909740164 in words is "six hundred fifty-five billion, nine hundred nine million, seven hundred forty thousand, one hundred sixty-four".