189953458892990 has 64 divisors (see below), whose sum is σ = 376063894934784. Its totient is φ = 68642200700928.

The previous prime is 189953458892971. The next prime is 189953458893013. The reversal of 189953458892990 is 99298854359981.

It is a super-2 number, since 2×189953458892990² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 189953458892896 and 189953458892905.

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, 197343362 + ... + 198303578.

It is an arithmetic number, because the mean of its divisors is an integer number (5875998358356).

Almost surely, 2^{189953458892990} is an apocalyptic number.

189953458892990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189953458892990 is a deficient number, since it is larger than the sum of its proper divisors (186110436041794).

189953458892990 is a wasteful number, since it uses less digits than its factorization.

189953458892990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992661.

The product of its (nonzero) digits is 18139852800, while the sum is 89.

The spelling of 189953458892990 in words is "one hundred eighty-nine trillion, nine hundred fifty-three billion, four hundred fifty-eight million, eight hundred ninety-two thousand, nine hundred ninety".