30642632761 has 8 divisors (see below), whose sum is σ = 34137681480. Its totient is φ = 27310144512.

The previous prime is 30642632749. The next prime is 30642632791. The reversal of 30642632761 is 16723624603.

It can be written as a sum of positive squares in 4 ways, for example, as 2130284025 + 28512348736 = 46155^2 + 168856^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 30642632761 - 2⁷ = 30642632633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30642632791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40639720 + ... + 40640473.

It is an arithmetic number, because the mean of its divisors is an integer number (4267210185).

Almost surely, 2^30642632761 is an apocalyptic number.

It is an amenable number.

30642632761 is a deficient number, since it is larger than the sum of its proper divisors (3495048719).

30642632761 is a wasteful number, since it uses less digits than its factorization.

30642632761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81280235.

The product of its (nonzero) digits is 217728, while the sum is 40.

The spelling of 30642632761 in words is "thirty billion, six hundred forty-two million, six hundred thirty-two thousand, seven hundred sixty-one".