261436368086 has 16 divisors (see below), whose sum is σ = 399571801200. Its totient is φ = 128245991328.

The previous prime is 261436368077. The next prime is 261436368107. The reversal of 261436368086 is 680863634162.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

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, 3166700 + ... + 3248208.

It is an arithmetic number, because the mean of its divisors is an integer number (24973237575).

Almost surely, 2^261436368086 is an apocalyptic number.

261436368086 is a deficient number, since it is larger than the sum of its proper divisors (138135433114).

261436368086 is a wasteful number, since it uses less digits than its factorization.

261436368086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111823.

The product of its (nonzero) digits is 5971968, while the sum is 53.

The spelling of 261436368086 in words is "two hundred sixty-one billion, four hundred thirty-six million, three hundred sixty-eight thousand, eighty-six".