30750642657 has 32 divisors (see below), whose sum is σ = 52132181760. Its totient is φ = 17548980480.

The previous prime is 30750642641. The next prime is 30750642677. The reversal of 30750642657 is 75624605703.

It is not a de Polignac number, because 30750642657 - 2⁴ = 30750642641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30750642677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40857 + ... + 251337.

It is an arithmetic number, because the mean of its divisors is an integer number (1629130680).

Almost surely, 2^30750642657 is an apocalyptic number.

It is an amenable number.

30750642657 is a deficient number, since it is larger than the sum of its proper divisors (21381539103).

30750642657 is a wasteful number, since it uses less digits than its factorization.

30750642657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211270 (or 211264 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 45.

The spelling of 30750642657 in words is "thirty billion, seven hundred fifty million, six hundred forty-two thousand, six hundred fifty-seven".