130810878581 has 4 divisors (see below), whose sum is σ = 130830142092. Its totient is φ = 130791615072.

The previous prime is 130810878551. The next prime is 130810878593. The reversal of 130810878581 is 185878018031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 185878018031 = 77969 ⋅2383999.

It can be written as a sum of positive squares in 2 ways, for example, as 35921620900 + 94889257681 = 189530^2 + 308041^2 .

It is a cyclic number.

It is not a de Polignac number, because 130810878581 - 2¹⁴ = 130810862197 is a prime.

It is a super-2 number, since 2×130810878581² (a number of 23 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 (130810878511) 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, 9621566 + ... + 9635151.

It is an arithmetic number, because the mean of its divisors is an integer number (32707535523).

Almost surely, 2^130810878581 is an apocalyptic number.

It is an amenable number.

130810878581 is a deficient number, since it is larger than the sum of its proper divisors (19263511).

130810878581 is an equidigital number, since it uses as much as digits as its factorization.

130810878581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19263510.

The product of its (nonzero) digits is 430080, while the sum is 50.

The spelling of 130810878581 in words is "one hundred thirty billion, eight hundred ten million, eight hundred seventy-eight thousand, five hundred eighty-one".