861742162270 has 64 divisors (see below), whose sum is σ = 1758821008896. Its totient is φ = 301218065280.

The previous prime is 861742162241. The next prime is 861742162283. The reversal of 861742162270 is 72261247168.

It is a self number, because there is not a number n which added to its sum of digits gives 861742162270.

It is a congruent number.

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, 937674 + ... + 1613293.

It is an arithmetic number, because the mean of its divisors is an integer number (27481578264).

Almost surely, 2^861742162270 is an apocalyptic number.

861742162270 is an abundant number, since it is smaller than the sum of its proper divisors (897078846626).

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

861742162270 is a wasteful number, since it uses less digits than its factorization.

861742162270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551105.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 861742162270 in words is "eight hundred sixty-one billion, seven hundred forty-two million, one hundred sixty-two thousand, two hundred seventy".