1656880272 has 100 divisors (see below), whose sum is σ = 4856494720. Its totient is φ = 545268672.

The previous prime is 1656880261. The next prime is 1656880273. The reversal of 1656880272 is 2720886561.

1656880272 is a `hidden beast` number, since 1 + 6 + 568 + 80 + 2 + 7 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (1656880273) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 94293 + ... + 110475.

Almost surely, 2^1656880272 is an apocalyptic number.

1656880272 is a gapful number since it is divisible by the number (12) 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 1656880272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2428247360).

1656880272 is an abundant number, since it is smaller than the sum of its proper divisors (3199614448).

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

1656880272 is a wasteful number, since it uses less digits than its factorization.

1656880272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16282 (or 16267 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 1656880272 is about 40704.7942139498. The cubic root of 1656880272 is about 1183.3059337613.

The spelling of 1656880272 in words is "one billion, six hundred fifty-six million, eight hundred eighty thousand, two hundred seventy-two".