186995492149890 has 32 divisors (see below), whose sum is σ = 451296383302080. Its totient is φ = 49586886557504.

The previous prime is 186995492149871. The next prime is 186995492149937. The reversal of 186995492149890 is 98941294599681.

It is a happy number.

It is a super-2 number, since 2×186995492149890² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17411120529 + ... + 17411131268.

It is an arithmetic number, because the mean of its divisors is an integer number (14103011978190).

Almost surely, 2^{186995492149890} is an apocalyptic number.

186995492149890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

186995492149890 is an abundant number, since it is smaller than the sum of its proper divisors (264300891152190).

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

186995492149890 is a wasteful number, since it uses less digits than its factorization.

186995492149890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34822251986.

The product of its (nonzero) digits is 3627970560, while the sum is 84.

The spelling of 186995492149890 in words is "one hundred eighty-six trillion, nine hundred ninety-five billion, four hundred ninety-two million, one hundred forty-nine thousand, eight hundred ninety".