45171630721 has 16 divisors (see below), whose sum is σ = 52571013120. Its totient is φ = 38013388560.

The previous prime is 45171630719. The next prime is 45171630737. The reversal of 45171630721 is 12703617154.

It is not a de Polignac number, because 45171630721 - 2¹ = 45171630719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45171630221) 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, 71361 + ... + 308926.

It is an arithmetic number, because the mean of its divisors is an integer number (3285688320).

Almost surely, 2^45171630721 is an apocalyptic number.

It is an amenable number.

45171630721 is a deficient number, since it is larger than the sum of its proper divisors (7399382399).

45171630721 is a wasteful number, since it uses less digits than its factorization.

45171630721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380604.

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 45171630721 in words is "forty-five billion, one hundred seventy-one million, six hundred thirty thousand, seven hundred twenty-one".