190989352991 has 16 divisors (see below), whose sum is σ = 204120576000. Its totient is φ = 178069529088.

The previous prime is 190989352951. The next prime is 190989353003. The reversal of 190989352991 is 199253989091.

It is a cyclic number.

It is not a de Polignac number, because 190989352991 - 2¹⁴ = 190989336607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190989352901) 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, 14915810 + ... + 14928608.

It is an arithmetic number, because the mean of its divisors is an integer number (12757536000).

Almost surely, 2^190989352991 is an apocalyptic number.

190989352991 is a deficient number, since it is larger than the sum of its proper divisors (13131223009).

190989352991 is a wasteful number, since it uses less digits than its factorization.

190989352991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20978.

The product of its (nonzero) digits is 14171760, while the sum is 65.

The spelling of 190989352991 in words is "one hundred ninety billion, nine hundred eighty-nine million, three hundred fifty-two thousand, nine hundred ninety-one".