30981600690 has 32 divisors (see below), whose sum is σ = 75050763840. Its totient is φ = 8184546624.

The previous prime is 30981600647. The next prime is 30981600703. The reversal of 30981600690 is 9600618903.

It is a super-2 number, since 2×30981600690² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4822585 + ... + 4829004.

It is an arithmetic number, because the mean of its divisors is an integer number (2345336370).

Almost surely, 2^30981600690 is an apocalyptic number.

30981600690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30981600690 is an abundant number, since it is smaller than the sum of its proper divisors (44069163150).

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

30981600690 is a wasteful number, since it uses less digits than its factorization.

30981600690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9651706.

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 30981600690 in words is "thirty billion, nine hundred eighty-one million, six hundred thousand, six hundred ninety".