30638734651 has 16 divisors (see below), whose sum is σ = 36601790400. Its totient is φ = 25621229760.

The previous prime is 30638734627. The next prime is 30638734673. The reversal of 30638734651 is 15643783603.

It is not a de Polignac number, because 30638734651 - 2¹⁹ = 30638210363 is a prime.

It is a super-2 number, since 2×30638734651² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30638734351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1075276 + ... + 1103401.

It is an arithmetic number, because the mean of its divisors is an integer number (2287611900).

Almost surely, 2^30638734651 is an apocalyptic number.

30638734651 is a deficient number, since it is larger than the sum of its proper divisors (5963055749).

30638734651 is an equidigital number, since it uses as much as digits as its factorization.

30638734651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178739 (or 2178725 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 30638734651 in words is "thirty billion, six hundred thirty-eight million, seven hundred thirty-four thousand, six hundred fifty-one".