457821920872 has 8 divisors (see below), whose sum is σ = 858416101650. Its totient is φ = 228910960432.

The previous prime is 457821920821. The next prime is 457821920879. The reversal of 457821920872 is 278029128754.

It can be written as a sum of positive squares in only one way, i.e., 457508843236 + 313077636 = 676394^2 + 17694^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×457821920872² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (457821920879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28613870047 + ... + 28613870062.

Almost surely, 2^457821920872 is an apocalyptic number.

It is an amenable number.

457821920872 is a deficient number, since it is larger than the sum of its proper divisors (400594180778).

457821920872 is a wasteful number, since it uses less digits than its factorization.

457821920872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57227740115 (or 57227740111 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 457821920872 in words is "four hundred fifty-seven billion, eight hundred twenty-one million, nine hundred twenty thousand, eight hundred seventy-two".