7875064581 has 32 divisors (see below), whose sum is σ = 11370378240. Its totient is φ = 4830142464.

The previous prime is 7875064573. The next prime is 7875064583. The reversal of 7875064581 is 1854605787.

It is a happy number.

It is not a de Polignac number, because 7875064581 - 2³ = 7875064573 is a prime.

It is a super-2 number, since 2×7875064581² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7875064583) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 411340 + ... + 430058.

It is an arithmetic number, because the mean of its divisors is an integer number (355324320).

Almost surely, 2^7875064581 is an apocalyptic number.

It is an amenable number.

7875064581 is a deficient number, since it is larger than the sum of its proper divisors (3495313659).

7875064581 is a wasteful number, since it uses less digits than its factorization.

7875064581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18925.

The product of its (nonzero) digits is 1881600, while the sum is 51.

The square root of 7875064581 is about 88741.5606184611. The cubic root of 7875064581 is about 1989.5340424835.

The spelling of 7875064581 in words is "seven billion, eight hundred seventy-five million, sixty-four thousand, five hundred eighty-one".