261123424770777 has 8 divisors (see below), whose sum is σ = 349519292301216. Its totient is φ = 173404920210432.

The previous prime is 261123424770757. The next prime is 261123424770809. The reversal of 261123424770777 is 777077424321162.

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

It is not a de Polignac number, because 261123424770777 - 2¹⁴ = 261123424754393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261123424770777.

It is not an unprimeable number, because it can be changed into a prime (261123424770727) 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, 169340741623 + ... + 169340743164.

It is an arithmetic number, because the mean of its divisors is an integer number (43689911537652).

Almost surely, 2^{261123424770777} is an apocalyptic number.

It is an amenable number.

261123424770777 is a deficient number, since it is larger than the sum of its proper divisors (88395867530439).

261123424770777 is a wasteful number, since it uses less digits than its factorization.

261123424770777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338681485047.

The product of its (nonzero) digits is 38723328, while the sum is 60.

The spelling of 261123424770777 in words is "two hundred sixty-one trillion, one hundred twenty-three billion, four hundred twenty-four million, seven hundred seventy thousand, seven hundred seventy-seven".