1656546520 has 16 divisors (see below), whose sum is σ = 3727229760. Its totient is φ = 662618592.

The previous prime is 1656546467. The next prime is 1656546533. The reversal of 1656546520 is 256456561.

It is a super-2 number, since 2×1656546520² = 5488292745848220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 41413663 = 1656546520 / (1 + 6 + 5 + 6 + 5 + 4 + 6 + 5 + 2 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20706792 + ... + 20706871.

It is an arithmetic number, because the mean of its divisors is an integer number (232951860).

Almost surely, 2^1656546520 is an apocalyptic number.

1656546520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1656546520 is an abundant number, since it is smaller than the sum of its proper divisors (2070683240).

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

1656546520 is a wasteful number, since it uses less digits than its factorization.

1656546520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41413674 (or 41413670 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The square root of 1656546520 is about 40700.6943429716. The cubic root of 1656546520 is about 1183.2264757483.

The spelling of 1656546520 in words is "one billion, six hundred fifty-six million, five hundred forty-six thousand, five hundred twenty".