721352470473 has 6 divisors (see below), whose sum is σ = 1041953568474. Its totient is φ = 480901646976.

The previous prime is 721352470417. The next prime is 721352470537. The reversal of 721352470473 is 374074253127.

721352470473 is a `hidden beast` number, since 7 + 2 + 13 + 524 + 70 + 47 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 366378405264 + 354974065209 = 605292^2 + 595797^2 .

It is not a de Polignac number, because 721352470473 - 2³⁴ = 704172601289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (721352460473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40075137240 + ... + 40075137257.

It is an arithmetic number, because the mean of its divisors is an integer number (173658928079).

Almost surely, 2^721352470473 is an apocalyptic number.

It is an amenable number.

721352470473 is a deficient number, since it is larger than the sum of its proper divisors (320601098001).

721352470473 is a wasteful number, since it uses less digits than its factorization.

721352470473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80150274503 (or 80150274500 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 45.

The spelling of 721352470473 in words is "seven hundred twenty-one billion, three hundred fifty-two million, four hundred seventy thousand, four hundred seventy-three".