261675340376744 has 16 divisors (see below), whose sum is σ = 560732872236000. Its totient is φ = 112146574447152.

The previous prime is 261675340376741. The next prime is 261675340376767. The reversal of 261675340376744 is 447673043576162.

It is a super-2 number, since 2×261675340376744² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261675340376741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2336386967594 + ... + 2336386967705.

It is an arithmetic number, because the mean of its divisors is an integer number (35045804514750).

Almost surely, 2^{261675340376744} is an apocalyptic number.

It is an amenable number.

261675340376744 is an abundant number, since it is smaller than the sum of its proper divisors (299057531859256).

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

261675340376744 is a wasteful number, since it uses less digits than its factorization.

261675340376744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4672773935312 (or 4672773935308 counting only the distinct ones).

The product of its (nonzero) digits is 426746880, while the sum is 65.

The spelling of 261675340376744 in words is "two hundred sixty-one trillion, six hundred seventy-five billion, three hundred forty million, three hundred seventy-six thousand, seven hundred forty-four".