30861138893 has 8 divisors (see below), whose sum is σ = 33243878808. Its totient is φ = 28479657024.

The previous prime is 30861138883. The next prime is 30861138899. The reversal of 30861138893 is 39883116803.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 347337769 + 30513801124 = 18637^2 + 174682^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-30861138893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30861138899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263246 + ... + 361967.

It is an arithmetic number, because the mean of its divisors is an integer number (4155484851).

Almost surely, 2^30861138893 is an apocalyptic number.

It is an amenable number.

30861138893 is a deficient number, since it is larger than the sum of its proper divisors (2382739915).

30861138893 is a wasteful number, since it uses less digits than its factorization.

30861138893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629023.

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 30861138893 in words is "thirty billion, eight hundred sixty-one million, one hundred thirty-eight thousand, eight hundred ninety-three".