201456856620 has 96 divisors (see below), whose sum is σ = 637029435840. Its totient is φ = 52841134080.

The previous prime is 201456856619. The next prime is 201456856639. The reversal of 201456856620 is 26658654102.

201456856620 is a `hidden beast` number, since 2 + 0 + 1 + 4 + 5 + 68 + 566 + 20 = 666.

It is a super-2 number, since 2×201456856620² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3024997 + ... + 3090876.

It is an arithmetic number, because the mean of its divisors is an integer number (6635723290).

Almost surely, 2^201456856620 is an apocalyptic number.

201456856620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201456856620 is an abundant number, since it is smaller than the sum of its proper divisors (435572579220).

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

201456856620 is a wasteful number, since it uses less digits than its factorization.

201456856620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6115952 (or 6115944 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 201456856620 in words is "two hundred one billion, four hundred fifty-six million, eight hundred fifty-six thousand, six hundred twenty".