1656632250 has 640 divisors, whose sum is σ = 6088642560. Its totient is φ = 326592000.

The previous prime is 1656632239. The next prime is 1656632317. The reversal of 1656632250 is 522366561.

It is a happy number.

1656632250 is a `hidden beast` number, since 16 + 5 + 6 + 632 + 2 + 5 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 53439735 + ... + 53439765.

It is an arithmetic number, because the mean of its divisors is an integer number (9513504).

Almost surely, 2^1656632250 is an apocalyptic number.

1656632250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1656632250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3044321280).

1656632250 is an abundant number, since it is smaller than the sum of its proper divisors (4432010310).

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

1656632250 is a wasteful number, since it uses less digits than its factorization.

1656632250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 1656632250 is about 40701.7475054819. The cubic root of 1656632250 is about 1183.2468869381.

The spelling of 1656632250 in words is "one billion, six hundred fifty-six million, six hundred thirty-two thousand, two hundred fifty".