261211112162 has 48 divisors (see below), whose sum is σ = 530060991936. Its totient is φ = 93942050400.

The previous prime is 261211112147. The next prime is 261211112189.

It is a happy number.

261211112162 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5908664 + ... + 5952707.

It is an arithmetic number, because the mean of its divisors is an integer number (11042937332).

Almost surely, 2^261211112162 is an apocalyptic number.

261211112162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261211112162 is an abundant number, since it is smaller than the sum of its proper divisors (268849879774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261211112162 is a wasteful number, since it uses less digits than its factorization.

261211112162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11861415 (or 11861404 counting only the distinct ones).

The product of its digits is 576, while the sum is 26.

It can be divided in two parts, 261211 and 112162, that added together give a palindrome (373373).

The spelling of 261211112162 in words is "two hundred sixty-one billion, two hundred eleven million, one hundred twelve thousand, one hundred sixty-two".