1656980540 has 24 divisors (see below), whose sum is σ = 3599648640. Its totient is φ = 639937088.

The previous prime is 1656980537. The next prime is 1656980579. The reversal of 1656980540 is 450896561.

It is a junction number, because it is equal to n+sod(n) for n = 1656980491 and 1656980500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1427852 + ... + 1429011.

It is an arithmetic number, because the mean of its divisors is an integer number (149985360).

Almost surely, 2^1656980540 is an apocalyptic number.

1656980540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1656980540 is an abundant number, since it is smaller than the sum of its proper divisors (1942668100).

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

1656980540 is a wasteful number, since it uses less digits than its factorization.

1656980540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856901 (or 2856899 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 1656980540 is about 40706.0258438477. The cubic root of 1656980540 is about 1183.3298029827.

The spelling of 1656980540 in words is "one billion, six hundred fifty-six million, nine hundred eighty thousand, five hundred forty".