1656656154 has 24 divisors (see below), whose sum is σ = 3800564820. Its totient is φ = 519735168.

The previous prime is 1656656147. The next prime is 1656656173. The reversal of 1656656154 is 4516566561.

It can be written as a sum of positive squares in 2 ways, for example, as 1605204225 + 51451929 = 40065^2 + 7173^2 .

It is a super-2 number, since 2×1656656154² = 5489019225172143432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2706649 + ... + 2707260.

Almost surely, 2^1656656154 is an apocalyptic number.

1656656154 is an abundant number, since it is smaller than the sum of its proper divisors (2143908666).

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

1656656154 is a wasteful number, since it uses less digits than its factorization.

1656656154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5413934 (or 5413931 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 1656656154 is about 40702.0411527481. The cubic root of 1656656154 is about 1183.2525780417.

The spelling of 1656656154 in words is "one billion, six hundred fifty-six million, six hundred fifty-six thousand, one hundred fifty-four".