261362057231431 has 4 divisors (see below), whose sum is σ = 281466830864632. Its totient is φ = 241257283598232.

The previous prime is 261362057231423. The next prime is 261362057231449. The reversal of 261362057231431 is 134132750263162.

261362057231431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261362057231431 - 2³ = 261362057231423 is a prime.

It is a super-2 number, since 2×261362057231431² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261362057232431) 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, 10052386816581 + ... + 10052386816606.

It is an arithmetic number, because the mean of its divisors is an integer number (70366707716158).

Almost surely, 2^{261362057231431} is an apocalyptic number.

261362057231431 is a deficient number, since it is larger than the sum of its proper divisors (20104773633201).

261362057231431 is a wasteful number, since it uses less digits than its factorization.

261362057231431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20104773633200.

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 261362057231431 in words is "two hundred sixty-one trillion, three hundred sixty-two billion, fifty-seven million, two hundred thirty-one thousand, four hundred thirty-one".