30900862208681 has 4 divisors (see below), whose sum is σ = 30900897096132. Its totient is φ = 30900827321232.

The previous prime is 30900862208653. The next prime is 30900862208683. The reversal of 30900862208681 is 18680226800903.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21736892096656 + 9163970112025 = 4662284^2 + 3027205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30900862208681 is a prime.

It is a super-2 number, since 2×30900862208681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30900862208683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16079570 + ... + 17898443.

It is an arithmetic number, because the mean of its divisors is an integer number (7725224274033).

Almost surely, 2^{30900862208681} is an apocalyptic number.

It is an amenable number.

30900862208681 is a deficient number, since it is larger than the sum of its proper divisors (34887451).

30900862208681 is an equidigital number, since it uses as much as digits as its factorization.

30900862208681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34887450.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 30900862208681 in words is "thirty trillion, nine hundred billion, eight hundred sixty-two million, two hundred eight thousand, six hundred eighty-one".