189687820956 has 48 divisors (see below), whose sum is σ = 465967407360. Its totient is φ = 59892739200.

The previous prime is 189687820951. The next prime is 189687820957. The reversal of 189687820956 is 659028786981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189687820951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1619440 + ... + 1732616.

It is an arithmetic number, because the mean of its divisors is an integer number (9707654320).

Almost surely, 2^189687820956 is an apocalyptic number.

It is an amenable number.

189687820956 is an abundant number, since it is smaller than the sum of its proper divisors (276279586404).

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

189687820956 is a wasteful number, since it uses less digits than its factorization.

189687820956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120554 (or 120552 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 69.

The spelling of 189687820956 in words is "one hundred eighty-nine billion, six hundred eighty-seven million, eight hundred twenty thousand, nine hundred fifty-six".