30726934681 has 3 divisors (see below), whose sum is σ = 30727109973. Its totient is φ = 30726759390.

The previous prime is 30726934657. The next prime is 30726934781. The reversal of 30726934681 is 18643962703.

The square root of 30726934681 is 175291.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 30726934681 - 2⁹ = 30726934169 is a prime.

It is a super-2 number, since 2×30726934681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30726934081) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 87646 + ... + 262936.

It is an arithmetic number, because the mean of its divisors is an integer number (10242369991).

Almost surely, 2^30726934681 is an apocalyptic number.

30726934681 is the 175291-st square number.

30726934681 is the 87646-th centered octagonal number.

It is an amenable number.

30726934681 is a deficient number, since it is larger than the sum of its proper divisors (175292).

30726934681 is an frugal number, since it uses more digits than its factorization.

30726934681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350582 (or 175291 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 49.

Multiplying 30726934681 by its sum of digits (49), we get a square (1505619799369 = 1227037²).

The spelling of 30726934681 in words is "thirty billion, seven hundred twenty-six million, nine hundred thirty-four thousand, six hundred eighty-one".