2506623651 has 120 divisors (see below), whose sum is σ = 4580061024. Its totient is φ = 1337783040.

The previous prime is 2506623649. The next prime is 2506623653. The reversal of 2506623651 is 1563266052.

It is a happy number.

2506623651 is a `hidden beast` number, since 25 + 0 + 6 + 623 + 6 + 5 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (2506623649) and next prime (2506623653).

It is not a de Polignac number, because 2506623651 - 2¹ = 2506623649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2506623653) by changing a digit.

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 119 ways as a sum of consecutive naturals, for example, 18296455 + ... + 18296591.

Almost surely, 2^2506623651 is an apocalyptic number.

2506623651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2506623651 is a deficient number, since it is larger than the sum of its proper divisors (2073437373).

2506623651 is a wasteful number, since it uses less digits than its factorization.

2506623651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 231 counting only the distinct ones).

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

The square root of 2506623651 is about 50066.1926952709. The cubic root of 2506623651 is about 1358.4063749482.

The spelling of 2506623651 in words is "two billion, five hundred six million, six hundred twenty-three thousand, six hundred fifty-one".