261485898167 has 16 divisors (see below), whose sum is σ = 298584958560. Its totient is φ = 226998692352.

The previous prime is 261485898137. The next prime is 261485898197. The reversal of 261485898167 is 761898584162.

It is an interprime number because it is at equal distance from previous prime (261485898137) and next prime (261485898197).

It is a cyclic number.

It is not a de Polignac number, because 261485898167 - 2¹⁶ = 261485832631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261485898137) 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, 3829838 + ... + 3897515.

It is an arithmetic number, because the mean of its divisors is an integer number (18661559910).

Almost surely, 2^261485898167 is an apocalyptic number.

261485898167 is a deficient number, since it is larger than the sum of its proper divisors (37099060393).

261485898167 is a wasteful number, since it uses less digits than its factorization.

261485898167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7727522.

The product of its digits is 46448640, while the sum is 65.

The spelling of 261485898167 in words is "two hundred sixty-one billion, four hundred eighty-five million, eight hundred ninety-eight thousand, one hundred sixty-seven".