261626066761888 has 48 divisors (see below), whose sum is σ = 518516675498304. Its totient is φ = 129939389798400.

The previous prime is 261626066761859. The next prime is 261626066761909. The reversal of 261626066761888 is 888167660626162.

261626066761888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 261626066761888.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84621456 + ... + 87658672.

It is an arithmetic number, because the mean of its divisors is an integer number (10802430739548).

Almost surely, 2^{261626066761888} is an apocalyptic number.

It is an amenable number.

261626066761888 is a deficient number, since it is larger than the sum of its proper divisors (256890608736416).

261626066761888 is a wasteful number, since it uses less digits than its factorization.

261626066761888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3055205 (or 3055197 counting only the distinct ones).

The product of its (nonzero) digits is 668860416, while the sum is 73.

The spelling of 261626066761888 in words is "two hundred sixty-one trillion, six hundred twenty-six billion, sixty-six million, seven hundred sixty-one thousand, eight hundred eighty-eight".