30741831581 has 16 divisors (see below), whose sum is σ = 32389453824. Its totient is φ = 29142923904.

The previous prime is 30741831557. The next prime is 30741831599. The reversal of 30741831581 is 18513814703.

It is a happy number.

It is not a de Polignac number, because 30741831581 - 2¹⁰ = 30741830557 is a prime.

It is a super-2 number, since 2×30741831581² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30741831541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348161 + ... + 427433.

It is an arithmetic number, because the mean of its divisors is an integer number (2024340864).

Almost surely, 2^30741831581 is an apocalyptic number.

It is an amenable number.

30741831581 is a deficient number, since it is larger than the sum of its proper divisors (1647622243).

30741831581 is a wasteful number, since it uses less digits than its factorization.

30741831581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79580.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 30741831581 in words is "thirty billion, seven hundred forty-one million, eight hundred thirty-one thousand, five hundred eighty-one".