30261905681 has 12 divisors (see below), whose sum is σ = 35818753152. Its totient is φ = 25044330864.

The previous prime is 30261905671. The next prime is 30261905711. The reversal of 30261905681 is 18650916203.

It is not a de Polignac number, because 30261905681 - 2¹⁰ = 30261904657 is a prime.

It is a super-2 number, since 2×30261905681² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (30261905671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2564345 + ... + 2576118.

It is an arithmetic number, because the mean of its divisors is an integer number (2984896096).

Almost surely, 2^30261905681 is an apocalyptic number.

It is an amenable number.

30261905681 is a deficient number, since it is larger than the sum of its proper divisors (5556847471).

30261905681 is an equidigital number, since it uses as much as digits as its factorization.

30261905681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5140528 (or 5140499 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 30261905681 in words is "thirty billion, two hundred sixty-one million, nine hundred five thousand, six hundred eighty-one".