261487784162 has 32 divisors (see below), whose sum is σ = 450913785984. Its totient is φ = 112564672000.

The previous prime is 261487784113. The next prime is 261487784189.

261487784162 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×261487784162² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261487784098 and 261487784107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2507183 + ... + 2609394.

It is an arithmetic number, because the mean of its divisors is an integer number (14091055812).

Almost surely, 2^261487784162 is an apocalyptic number.

261487784162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261487784162 is a deficient number, since it is larger than the sum of its proper divisors (189426001822).

261487784162 is a wasteful number, since it uses less digits than its factorization.

261487784162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5116714.

The product of its digits is 7225344, while the sum is 56.

The spelling of 261487784162 in words is "two hundred sixty-one billion, four hundred eighty-seven million, seven hundred eighty-four thousand, one hundred sixty-two".