196686121645590 has 32 divisors (see below), whose sum is σ = 492570461166336. Its totient is φ = 50169213636960.

The previous prime is 196686121645561. The next prime is 196686121645597. The reversal of 196686121645590 is 95546121686691.

196686121645590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196686121645597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142526174416 + ... + 142526175795.

It is an arithmetic number, because the mean of its divisors is an integer number (15392826911448).

Almost surely, 2^{196686121645590} is an apocalyptic number.

196686121645590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

196686121645590 is an abundant number, since it is smaller than the sum of its proper divisors (295884339520746).

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

196686121645590 is a wasteful number, since it uses less digits than its factorization.

196686121645590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285052350244.

The product of its (nonzero) digits is 167961600, while the sum is 69.

The spelling of 196686121645590 in words is "one hundred ninety-six trillion, six hundred eighty-six billion, one hundred twenty-one million, six hundred forty-five thousand, five hundred ninety".