261412440319 has 2 divisors, whose sum is σ = 261412440320. Its totient is φ = 261412440318.

The previous prime is 261412440281. The next prime is 261412440337. The reversal of 261412440319 is 913044214162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261412440319 - 2¹¹ = 261412438271 is a prime.

It is a super-2 number, since 2×261412440319² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261412440719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130706220159 + 130706220160.

It is an arithmetic number, because the mean of its divisors is an integer number (130706220160).

Almost surely, 2^261412440319 is an apocalyptic number.

261412440319 is a deficient number, since it is larger than the sum of its proper divisors (1).

261412440319 is an equidigital number, since it uses as much as digits as its factorization.

261412440319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 261412440319 in words is "two hundred sixty-one billion, four hundred twelve million, four hundred forty thousand, three hundred nineteen".