261273481628088 has 64 divisors (see below), whose sum is σ = 691608344988960. Its totient is φ = 81967905755136.

The previous prime is 261273481628077. The next prime is 261273481628111. The reversal of 261273481628088 is 880826184372162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175112070 + ... + 176597802.

Almost surely, 2^{261273481628088} is an apocalyptic number.

It is an amenable number.

261273481628088 is an abundant number, since it is smaller than the sum of its proper divisors (430334863360872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261273481628088 is a wasteful number, since it uses less digits than its factorization.

261273481628088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916776 (or 1916772 counting only the distinct ones).

The product of its (nonzero) digits is 99090432, while the sum is 66.

The spelling of 261273481628088 in words is "two hundred sixty-one trillion, two hundred seventy-three billion, four hundred eighty-one million, six hundred twenty-eight thousand, eighty-eight".