30157322661 has 24 divisors (see below), whose sum is σ = 44500809600. Its totient is φ = 19671186816.

The previous prime is 30157322651. The next prime is 30157322681. The reversal of 30157322661 is 16622375103.

30157322661 is a `hidden beast` number, since 3 + 0 + 1 + 573 + 2 + 26 + 61 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-30157322661 is a prime.

It is a super-2 number, since 2×30157322661² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30157322621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1725181 + ... + 1742573.

It is an arithmetic number, because the mean of its divisors is an integer number (1854200400).

Almost surely, 2^30157322661 is an apocalyptic number.

It is an amenable number.

30157322661 is a deficient number, since it is larger than the sum of its proper divisors (14343486939).

30157322661 is a wasteful number, since it uses less digits than its factorization.

30157322661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21545 (or 21542 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

Adding to 30157322661 its reverse (16622375103), we get a palindrome (46779697764).

The spelling of 30157322661 in words is "thirty billion, one hundred fifty-seven million, three hundred twenty-two thousand, six hundred sixty-one".