261772226744423 has 8 divisors (see below), whose sum is σ = 273157846032096. Its totient is φ = 250386958967200.

The previous prime is 261772226744341. The next prime is 261772226744459. The reversal of 261772226744423 is 324447622277162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261772226744423 - 2⁸ = 261772226744167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261772226744023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86355248 + ... + 89335173.

It is an arithmetic number, because the mean of its divisors is an integer number (34144730754012).

Almost surely, 2^{261772226744423} is an apocalyptic number.

261772226744423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

261772226744423 is a deficient number, since it is larger than the sum of its proper divisors (11385619287673).

261772226744423 is a wasteful number, since it uses less digits than its factorization.

261772226744423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175755225.

The product of its digits is 75866112, while the sum is 59.

The spelling of 261772226744423 in words is "two hundred sixty-one trillion, seven hundred seventy-two billion, two hundred twenty-six million, seven hundred forty-four thousand, four hundred twenty-three".