1656001650 has 24 divisors (see below), whose sum is σ = 4106884464. Its totient is φ = 441600400.

The previous prime is 1656001649. The next prime is 1656001651. The reversal of 1656001650 is 561006561.

It is an interprime number because it is at equal distance from previous prime (1656001649) and next prime (1656001651).

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1656001651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5519856 + ... + 5520155.

It is an arithmetic number, because the mean of its divisors is an integer number (171120186).

Almost surely, 2^1656001650 is an apocalyptic number.

1656001650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1656001650 is an abundant number, since it is smaller than the sum of its proper divisors (2450882814).

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

1656001650 is a wasteful number, since it uses less digits than its factorization.

1656001650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11040026 (or 11040021 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1656001650 is about 40694.0001720155. Note that the first 3 decimals coincide. The cubic root of 1656001650 is about 1183.0967328766.

The spelling of 1656001650 in words is "one billion, six hundred fifty-six million, one thousand, six hundred fifty".