261562020201366 has 16 divisors (see below), whose sum is σ = 535883163339888. Its totient is φ = 85060819577600.

The previous prime is 261562020201331. The next prime is 261562020201373. The reversal of 261562020201366 is 663102020265162.

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, 531630122115 + ... + 531630122606.

It is an arithmetic number, because the mean of its divisors is an integer number (33492697708743).

Almost surely, 2^{261562020201366} is an apocalyptic number.

261562020201366 is an abundant number, since it is smaller than the sum of its proper divisors (274321143138522).

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

261562020201366 is a wasteful number, since it uses less digits than its factorization.

261562020201366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063260244767.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 261562020201366 in words is "two hundred sixty-one trillion, five hundred sixty-two billion, twenty million, two hundred one thousand, three hundred sixty-six".