261233712954 has 32 divisors (see below), whose sum is σ = 581673536640. Its totient is φ = 86904778176.

The previous prime is 261233712941. The next prime is 261233712967. The reversal of 261233712954 is 459217332162.

It is a happy number.

261233712954 is a `hidden beast` number, since 2 + 61 + 233 + 71 + 295 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (261233712941) and next prime (261233712967).

It is a super-2 number, since 2×261233712954² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4781647 + ... + 4835970.

It is an arithmetic number, because the mean of its divisors is an integer number (18177298020).

Almost surely, 2^261233712954 is an apocalyptic number.

261233712954 is an abundant number, since it is smaller than the sum of its proper divisors (320439823686).

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

261233712954 is a wasteful number, since it uses less digits than its factorization.

261233712954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9618131 (or 9618125 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 261233712954 in words is "two hundred sixty-one billion, two hundred thirty-three million, seven hundred twelve thousand, nine hundred fifty-four".