8472371581 has 4 divisors (see below), whose sum is σ = 8475977664. Its totient is φ = 8468765500.

The previous prime is 8472371561. The next prime is 8472371587. The reversal of 8472371581 is 1851732748.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8472371581 - 2¹⁵ = 8472338813 is a prime.

It is a super-2 number, since 2×8472371581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8472371587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1799515 + ... + 1804216.

It is an arithmetic number, because the mean of its divisors is an integer number (2118994416).

Almost surely, 2^8472371581 is an apocalyptic number.

It is an amenable number.

8472371581 is a deficient number, since it is larger than the sum of its proper divisors (3606083).

8472371581 is a wasteful number, since it uses less digits than its factorization.

8472371581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3606082.

The product of its digits is 376320, while the sum is 46.

The square root of 8472371581 is about 92045.4864781538. The cubic root of 8472371581 is about 2038.6139807478.

The spelling of 8472371581 in words is "eight billion, four hundred seventy-two million, three hundred seventy-one thousand, five hundred eighty-one".