30751985642 has 96 divisors (see below), whose sum is σ = 57497489280. Its totient is φ = 12067735680.

The previous prime is 30751985623. The next prime is 30751985657. The reversal of 30751985642 is 24658915703.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28134848 + ... + 28135940.

It is an arithmetic number, because the mean of its divisors is an integer number (598932180).

It is a 2-persistent number, because it is pandigital, and so is 2⋅30751985642 = 61503971284, but 3⋅30751985642 = 92255956926 is not.

Almost surely, 2^30751985642 is an apocalyptic number.

30751985642 is the 143183-rd pentagonal number.

30751985642 is a deficient number, since it is larger than the sum of its proper divisors (26745503638).

30751985642 is a wasteful number, since it uses less digits than its factorization.

30751985642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308 (or 1285 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 30751985642 in words is "thirty billion, seven hundred fifty-one million, nine hundred eighty-five thousand, six hundred forty-two".