1656125000 has 56 divisors (see below), whose sum is σ = 3881786250. Its totient is φ = 662400000.

The previous prime is 1656124999. The next prime is 1656125113. The reversal of 1656125000 is 5216561.

It can be written as a sum of positive squares in 7 ways, for example, as 1085966116 + 570158884 = 32954^2 + 23878^2 .

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 118376 + ... + 131624.

Almost surely, 2^1656125000 is an apocalyptic number.

1656125000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1656125000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1940893125).

1656125000 is an abundant number, since it is smaller than the sum of its proper divisors (2225661250).

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

1656125000 is an frugal number, since it uses more digits than its factorization.

1656125000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13285 (or 13256 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1656125000 is about 40695.5157234799. The cubic root of 1656125000 is about 1183.1261071144.

The spelling of 1656125000 in words is "one billion, six hundred fifty-six million, one hundred twenty-five thousand".