261706772420333 has 16 divisors (see below), whose sum is σ = 270489133178880. Its totient is φ = 252945715302000.

The previous prime is 261706772420231. The next prime is 261706772420389. The reversal of 261706772420333 is 333024277607162.

It is a cyclic number.

It is not a de Polignac number, because 261706772420333 - 2⁸ = 261706772420077 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 (261706772410333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394667408 + ... + 395329958.

It is an arithmetic number, because the mean of its divisors is an integer number (16905570823680).

Almost surely, 2^{261706772420333} is an apocalyptic number.

It is an amenable number.

261706772420333 is a deficient number, since it is larger than the sum of its proper divisors (8782360758547).

261706772420333 is a wasteful number, since it uses less digits than its factorization.

261706772420333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678608.

The product of its (nonzero) digits is 10668672, while the sum is 53.

The spelling of 261706772420333 in words is "two hundred sixty-one trillion, seven hundred six billion, seven hundred seventy-two million, four hundred twenty thousand, three hundred thirty-three".