30856918113978 has 32 divisors (see below), whose sum is σ = 71284431153600. Its totient is φ = 8800547055360.

The previous prime is 30856918113943. The next prime is 30856918114007. The reversal of 30856918113978 is 87931181965803.

It is a super-2 number, since 2×30856918113978² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13750853653 + ... + 13750855896.

It is an arithmetic number, because the mean of its divisors is an integer number (2227638473550).

Almost surely, 2^{30856918113978} is an apocalyptic number.

30856918113978 is an abundant number, since it is smaller than the sum of its proper divisors (40427513039622).

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

30856918113978 is a wasteful number, since it uses less digits than its factorization.

30856918113978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27501709582.

The product of its (nonzero) digits is 78382080, while the sum is 69.

The spelling of 30856918113978 in words is "thirty trillion, eight hundred fifty-six billion, nine hundred eighteen million, one hundred thirteen thousand, nine hundred seventy-eight".