45724720721 has 8 divisors (see below), whose sum is σ = 47864498688. Its totient is φ = 43626492000.

The previous prime is 45724720711. The next prime is 45724720729. The reversal of 45724720721 is 12702742754.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45724720721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45724720729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10385060 + ... + 10389461.

It is an arithmetic number, because the mean of its divisors is an integer number (5983062336).

Almost surely, 2^45724720721 is an apocalyptic number.

It is an amenable number.

45724720721 is a deficient number, since it is larger than the sum of its proper divisors (2139777967).

45724720721 is a wasteful number, since it uses less digits than its factorization.

45724720721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20774623.

The product of its (nonzero) digits is 219520, while the sum is 41.

The spelling of 45724720721 in words is "forty-five billion, seven hundred twenty-four million, seven hundred twenty thousand, seven hundred twenty-one".