861087610355 has 32 divisors (see below), whose sum is σ = 1243210905600. Its totient is φ = 559321552512.

The previous prime is 861087610349. The next prime is 861087610379. The reversal of 861087610355 is 553016780168.

It is a happy number.

It is not a de Polignac number, because 861087610355 - 2⁶ = 861087610291 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6405926 + ... + 6538964.

It is an arithmetic number, because the mean of its divisors is an integer number (38850340800).

Almost surely, 2^861087610355 is an apocalyptic number.

861087610355 is a deficient number, since it is larger than the sum of its proper divisors (382123295245).

861087610355 is a wasteful number, since it uses less digits than its factorization.

861087610355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142803.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 861087610355 in words is "eight hundred sixty-one billion, eighty-seven million, six hundred ten thousand, three hundred fifty-five".