261612402656133 has 8 divisors (see below), whose sum is σ = 367175301973600. Its totient is φ = 165228885888048.

The previous prime is 261612402656107. The next prime is 261612402656149. The reversal of 261612402656133 is 331656204216162.

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

It is not a de Polignac number, because 261612402656133 - 2²² = 261612398461829 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 (261612402656933) 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, 2294845637278 + ... + 2294845637391.

It is an arithmetic number, because the mean of its divisors is an integer number (45896912746700).

Almost surely, 2^{261612402656133} is an apocalyptic number.

It is an amenable number.

261612402656133 is a deficient number, since it is larger than the sum of its proper divisors (105562899317467).

261612402656133 is a wasteful number, since it uses less digits than its factorization.

261612402656133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4589691274691.

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 261612402656133 in words is "two hundred sixty-one trillion, six hundred twelve billion, four hundred two million, six hundred fifty-six thousand, one hundred thirty-three".