261413518130 has 32 divisors (see below), whose sum is σ = 472728051504. Its totient is φ = 104081207296.

The previous prime is 261413518043. The next prime is 261413518139. The reversal of 261413518130 is 31815314162.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 61292390329 + 200121127801 = 247573^2 + 447349^2 .

It is a super-2 number, since 2×261413518130² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261413518139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1899734 + ... + 2032686.

Almost surely, 2^261413518130 is an apocalyptic number.

261413518130 is a deficient number, since it is larger than the sum of its proper divisors (211314533374).

261413518130 is a wasteful number, since it uses less digits than its factorization.

261413518130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133870.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 261413518130 in words is "two hundred sixty-one billion, four hundred thirteen million, five hundred eighteen thousand, one hundred thirty".