261052105456 has 20 divisors (see below), whose sum is σ = 507088693800. Its totient is φ = 130190507072.

The previous prime is 261052105409. The next prime is 261052105469. The reversal of 261052105456 is 654501250162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20965186 + ... + 20977633.

It is an arithmetic number, because the mean of its divisors is an integer number (25354434690).

Almost surely, 2^261052105456 is an apocalyptic number.

It is an amenable number.

261052105456 is a deficient number, since it is larger than the sum of its proper divisors (246036588344).

261052105456 is a wasteful number, since it uses less digits than its factorization.

261052105456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41943216 (or 41943210 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 261052105456 in words is "two hundred sixty-one billion, fifty-two million, one hundred five thousand, four hundred fifty-six".