189951768650 has 96 divisors (see below), whose sum is σ = 446123946240. Its totient is φ = 58630302720.

The previous prime is 189951768637. The next prime is 189951768731. The reversal of 189951768650 is 56867159981.

It is a super-3 number, since 3×189951768650³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 557165 + ... + 830864.

It is an arithmetic number, because the mean of its divisors is an integer number (4647124440).

Almost surely, 2^189951768650 is an apocalyptic number.

189951768650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189951768650 is an abundant number, since it is smaller than the sum of its proper divisors (256172177590).

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

189951768650 is a wasteful number, since it uses less digits than its factorization.

189951768650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388088 (or 1388083 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 65.

The spelling of 189951768650 in words is "one hundred eighty-nine billion, nine hundred fifty-one million, seven hundred sixty-eight thousand, six hundred fifty".