261162266454 has 24 divisors (see below), whose sum is σ = 599136964920. Its totient is φ = 81933259968.

The previous prime is 261162266413. The next prime is 261162266459. The reversal of 261162266454 is 454662261162.

261162266454 is a `hidden beast` number, since 2 + 6 + 11 + 622 + 6 + 6 + 4 + 5 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261162266459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 426735424 + ... + 426736035.

It is an arithmetic number, because the mean of its divisors is an integer number (24964040205).

Almost surely, 2^261162266454 is an apocalyptic number.

261162266454 is an abundant number, since it is smaller than the sum of its proper divisors (337974698466).

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

261162266454 is a wasteful number, since it uses less digits than its factorization.

261162266454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853471484 (or 853471481 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The spelling of 261162266454 in words is "two hundred sixty-one billion, one hundred sixty-two million, two hundred sixty-six thousand, four hundred fifty-four".