190927808639 has 8 divisors (see below), whose sum is σ = 208680110208. Its totient is φ = 173900090880.

The previous prime is 190927808557. The next prime is 190927808677. The reversal of 190927808639 is 936808729091.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190927808639 is a prime.

It is a super-2 number, since 2×190927808639² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190927808339) 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, 181145402 + ... + 181146455.

It is an arithmetic number, because the mean of its divisors is an integer number (26085013776).

Almost surely, 2^190927808639 is an apocalyptic number.

190927808639 is a deficient number, since it is larger than the sum of its proper divisors (17752301569).

190927808639 is a wasteful number, since it uses less digits than its factorization.

190927808639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362291905.

The product of its (nonzero) digits is 11757312, while the sum is 62.

The spelling of 190927808639 in words is "one hundred ninety billion, nine hundred twenty-seven million, eight hundred eight thousand, six hundred thirty-nine".