261422566420237 has 8 divisors (see below), whose sum is σ = 263838266128800. Its totient is φ = 259007181758064.

The previous prime is 261422566420151. The next prime is 261422566420261. The reversal of 261422566420237 is 732024665224162.

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 261422566420237 - 2⁷ = 261422566420109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261422566420277) 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, 77094187 + ... + 80413672.

It is an arithmetic number, because the mean of its divisors is an integer number (32979783266100).

Almost surely, 2^{261422566420237} is an apocalyptic number.

It is an amenable number.

261422566420237 is a deficient number, since it is larger than the sum of its proper divisors (2415699708563).

261422566420237 is a wasteful number, since it uses less digits than its factorization.

261422566420237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157523195.

The product of its (nonzero) digits is 11612160, while the sum is 52.

The spelling of 261422566420237 in words is "two hundred sixty-one trillion, four hundred twenty-two billion, five hundred sixty-six million, four hundred twenty thousand, two hundred thirty-seven".