45721145257 has 8 divisors (see below), whose sum is σ = 45929203200. Its totient is φ = 45513227424.

The previous prime is 45721145209. The next prime is 45721145287. The reversal of 45721145257 is 75254112754.

45721145257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-45721145257 is a prime.

It is a super-2 number, since 2×45721145257² (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 (45721145287) 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, 649344 + ... + 716302.

It is an arithmetic number, because the mean of its divisors is an integer number (5741150400).

Almost surely, 2^45721145257 is an apocalyptic number.

It is an amenable number.

45721145257 is a deficient number, since it is larger than the sum of its proper divisors (208057943).

45721145257 is a wasteful number, since it uses less digits than its factorization.

45721145257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70055.

The product of its digits is 392000, while the sum is 43.

The spelling of 45721145257 in words is "forty-five billion, seven hundred twenty-one million, one hundred forty-five thousand, two hundred fifty-seven".