261431265327141 has 32 divisors (see below), whose sum is σ = 429018156822528. Its totient is φ = 137896927300800.

The previous prime is 261431265327137. The next prime is 261431265327151. The reversal of 261431265327141 is 141723562134162.

It is not a de Polignac number, because 261431265327141 - 2² = 261431265327137 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261431265327131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40794466 + ... + 46765916.

It is an arithmetic number, because the mean of its divisors is an integer number (13406817400704).

Almost surely, 2^{261431265327141} is an apocalyptic number.

261431265327141 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

261431265327141 is a deficient number, since it is larger than the sum of its proper divisors (167586891495387).

261431265327141 is a wasteful number, since it uses less digits than its factorization.

261431265327141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6131841.

The product of its digits is 1451520, while the sum is 48.

The spelling of 261431265327141 in words is "two hundred sixty-one trillion, four hundred thirty-one billion, two hundred sixty-five million, three hundred twenty-seven thousand, one hundred forty-one".