1651632560 has 20 divisors (see below), whose sum is σ = 3840045888. Its totient is φ = 660652992.

The previous prime is 1651632559. The next prime is 1651632571. The reversal of 1651632560 is 652361561.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1651632560² = 5455780226504307200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1651632560.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10322624 + ... + 10322783.

Almost surely, 2^1651632560 is an apocalyptic number.

1651632560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1651632560 is an abundant number, since it is smaller than the sum of its proper divisors (2188413328).

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

1651632560 is a wasteful number, since it uses less digits than its factorization.

1651632560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20645420 (or 20645414 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1651632560 is about 40640.2824793332. The cubic root of 1651632560 is about 1182.0553473033.

The spelling of 1651632560 in words is "one billion, six hundred fifty-one million, six hundred thirty-two thousand, five hundred sixty".