30670881639 has 16 divisors (see below), whose sum is σ = 43825846272. Its totient is φ = 19029640608.

The previous prime is 30670881569. The next prime is 30670881677. The reversal of 30670881639 is 93618807603.

It is not a de Polignac number, because 30670881639 - 2¹⁹ = 30670357351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30670881591 and 30670881600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30670881739) 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, 6004279 + ... + 6009384.

It is an arithmetic number, because the mean of its divisors is an integer number (2739115392).

Almost surely, 2^30670881639 is an apocalyptic number.

30670881639 is a deficient number, since it is larger than the sum of its proper divisors (13154964633).

30670881639 is a wasteful number, since it uses less digits than its factorization.

30670881639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12013726.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 30670881639 in words is "thirty billion, six hundred seventy million, eight hundred eighty-one thousand, six hundred thirty-nine".