1656885612 has 24 divisors (see below), whose sum is σ = 3923770816. Its totient is φ = 544051728.

The previous prime is 1656885611. The next prime is 1656885649. The reversal of 1656885612 is 2165886561.

It is a super-2 number, since 2×1656885612² = 5490539862505229088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1656885611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1029598 + ... + 1031205.

Almost surely, 2^1656885612 is an apocalyptic number.

1656885612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1656885612 is an abundant number, since it is smaller than the sum of its proper divisors (2266885204).

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

1656885612 is a wasteful number, since it uses less digits than its factorization.

1656885612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060877 (or 2060875 counting only the distinct ones).

The product of its digits is 691200, while the sum is 48.

The square root of 1656885612 is about 40704.8598081359. The cubic root of 1656885612 is about 1183.3072049952.

The spelling of 1656885612 in words is "one billion, six hundred fifty-six million, eight hundred eighty-five thousand, six hundred twelve".