656202154020 has 384 divisors, whose sum is σ = 2217987932160. Its totient is φ = 141814333440.

The previous prime is 656202153991. The next prime is 656202154031. The reversal of 656202154020 is 20451202656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 99768972 + ... + 99775548.

It is an arithmetic number, because the mean of its divisors is an integer number (5776010240).

Almost surely, 2^656202154020 is an apocalyptic number.

656202154020 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 656202154020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1108993966080).

656202154020 is an abundant number, since it is smaller than the sum of its proper divisors (1561785778140).

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

656202154020 is a wasteful number, since it uses less digits than its factorization.

656202154020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6803 (or 6801 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 656202154020 its reverse (20451202656), we get a palindrome (676653356676).

The spelling of 656202154020 in words is "six hundred fifty-six billion, two hundred two million, one hundred fifty-four thousand, twenty".