1656351900 has 486 divisors, whose sum is σ = 6402293352. Its totient is φ = 357033600.

The previous prime is 1656351889. The next prime is 1656351941. The reversal of 1656351900 is 91536561.

1656351900 is a `hidden beast` number, since 1 + 6 + 5 + 635 + 19 + 0 + 0 = 666.

It is a super-2 number, since 2×1656351900² = 5487003233267220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 161 ways as a sum of consecutive naturals, for example, 23328865 + ... + 23328935.

Almost surely, 2^1656351900 is an apocalyptic number.

1656351900 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 1656351900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3201146676).

1656351900 is an abundant number, since it is smaller than the sum of its proper divisors (4745941452).

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

1656351900 is a wasteful number, since it uses less digits than its factorization.

1656351900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 1656351900 is about 40698.3034044418. The cubic root of 1656351900 is about 1183.1801366622.

The spelling of 1656351900 in words is "one billion, six hundred fifty-six million, three hundred fifty-one thousand, nine hundred".