861955662 has 16 divisors (see below), whose sum is σ = 1753130880. Its totient is φ = 282448632.

The previous prime is 861955657. The next prime is 861955667. The reversal of 861955662 is 266559168.

It is an interprime number because it is at equal distance from previous prime (861955657) and next prime (861955667).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861955667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1217098 + ... + 1217805.

It is an arithmetic number, because the mean of its divisors is an integer number (109570680).

Almost surely, 2^861955662 is an apocalyptic number.

861955662 is an abundant number, since it is smaller than the sum of its proper divisors (891175218).

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

861955662 is a wasteful number, since it uses less digits than its factorization.

861955662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434967.

The product of its digits is 777600, while the sum is 48.

The square root of 861955662 is about 29359.0814229601. The cubic root of 861955662 is about 951.6888378538.

The spelling of 861955662 in words is "eight hundred sixty-one million, nine hundred fifty-five thousand, six hundred sixty-two".