1656425100 has 72 divisors (see below), whose sum is σ = 5228290368. Its totient is φ = 401556800.

The previous prime is 1656425087. The next prime is 1656425131. The reversal of 1656425100 is 15246561.

It is a super-2 number, since 2×1656425100² = 5487488223820020000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247674 + ... + 254273.

It is an arithmetic number, because the mean of its divisors is an integer number (72615144).

Almost surely, 2^1656425100 is an apocalyptic number.

1656425100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1656425100 is an abundant number, since it is smaller than the sum of its proper divisors (3571865268).

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

1656425100 is a wasteful number, since it uses less digits than its factorization.

1656425100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501975 (or 501968 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1656425100 is about 40699.2026948932. The cubic root of 1656425100 is about 1183.1975660322.

The spelling of 1656425100 in words is "one billion, six hundred fifty-six million, four hundred twenty-five thousand, one hundred".