261511115162 has 32 divisors (see below), whose sum is σ = 442704927168. Its totient is φ = 114821200000.

The previous prime is 261511115161. The next prime is 261511115179.

261511115162 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (261511115161) 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, 1344164 + ... + 1526367.

It is an arithmetic number, because the mean of its divisors is an integer number (13834528974).

Almost surely, 2^261511115162 is an apocalyptic number.

261511115162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261511115162 is a deficient number, since it is larger than the sum of its proper divisors (181193812006).

261511115162 is a wasteful number, since it uses less digits than its factorization.

261511115162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870686.

The product of its digits is 3600, while the sum is 32.

It can be divided in two parts, 261511 and 115162, that added together give a palindrome (376673).

The spelling of 261511115162 in words is "two hundred sixty-one billion, five hundred eleven million, one hundred fifteen thousand, one hundred sixty-two".