2651590440 has 48 divisors (see below), whose sum is σ = 8617670100. Its totient is φ = 707090688.

The previous prime is 2651590423. The next prime is 2651590457. The reversal of 2651590440 is 440951562.

2651590440 is a `hidden beast` number, since 2 + 65 + 1 + 590 + 4 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (2651590423) and next prime (2651590457).

It can be written as a sum of positive squares in 2 ways, for example, as 2643399396 + 8191044 = 51414^2 + 2862^2 .

It is a super-2 number, since 2×2651590440² = 14061863722998787200, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 2651590395 and 2651590404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3682405 + ... + 3683124.

Almost surely, 2^2651590440 is an apocalyptic number.

2651590440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2651590440 is an abundant number, since it is smaller than the sum of its proper divisors (5966079660).

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

2651590440 is a wasteful number, since it uses less digits than its factorization.

2651590440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7365546 (or 7365539 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 2651590440 is about 51493.5961067005. The cubic root of 2651590440 is about 1384.1042903691.

The spelling of 2651590440 in words is "two billion, six hundred fifty-one million, five hundred ninety thousand, four hundred forty".