189967609650 has 192 divisors, whose sum is σ = 584410595328. Its totient is φ = 39765116160.

The previous prime is 189967609631. The next prime is 189967609651. The reversal of 189967609650 is 56906769981.

It is a happy number.

It is a super-2 number, since 2×189967609650² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189967609651) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1678759 + ... + 1788341.

It is an arithmetic number, because the mean of its divisors is an integer number (3043805184).

Almost surely, 2^189967609650 is an apocalyptic number.

189967609650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 189967609650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292205297664).

189967609650 is an abundant number, since it is smaller than the sum of its proper divisors (394442985678).

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

189967609650 is a wasteful number, since it uses less digits than its factorization.

189967609650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109745 (or 109740 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 66.

The spelling of 189967609650 in words is "one hundred eighty-nine billion, nine hundred sixty-seven million, six hundred nine thousand, six hundred fifty".