861790164 has 24 divisors (see below), whose sum is σ = 2011318848. Its totient is φ = 287195520.

The previous prime is 861790159. The next prime is 861790169. The reversal of 861790164 is 461097168.

It is an interprime number because it is at equal distance from previous prime (861790159) and next prime (861790169).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861790169) 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, 92529 + ... + 101415.

It is an arithmetic number, because the mean of its divisors is an integer number (83804952).

Almost surely, 2^861790164 is an apocalyptic number.

It is an amenable number.

861790164 is an abundant number, since it is smaller than the sum of its proper divisors (1149528684).

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

861790164 is a wasteful number, since it uses less digits than its factorization.

861790164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16975 (or 16973 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 861790164 is about 29356.2627730438. The cubic root of 861790164 is about 951.6279249447.

The spelling of 861790164 in words is "eight hundred sixty-one million, seven hundred ninety thousand, one hundred sixty-four".