261422657460734 has 24 divisors (see below), whose sum is σ = 492598065301104. Its totient is φ = 101852983425600.

The previous prime is 261422657460641. The next prime is 261422657460773. The reversal of 261422657460734 is 437064756224162.

It is a happy number.

It is a super-2 number, since 2×261422657460734² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77161349387 + ... + 77161352774.

It is an arithmetic number, because the mean of its divisors is an integer number (20524919387546).

Almost surely, 2^{261422657460734} is an apocalyptic number.

261422657460734 is a deficient number, since it is larger than the sum of its proper divisors (231175407840370).

261422657460734 is a wasteful number, since it uses less digits than its factorization.

261422657460734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154322702192 (or 154322702181 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 59.

The spelling of 261422657460734 in words is "two hundred sixty-one trillion, four hundred twenty-two billion, six hundred fifty-seven million, four hundred sixty thousand, seven hundred thirty-four".