189412618040 has 64 divisors (see below), whose sum is σ = 448888500000. Its totient is φ = 71732666880.

The previous prime is 189412618033. The next prime is 189412618051. The reversal of 189412618040 is 40816214981.

It is a junction number, because it is equal to n+sod(n) for n = 189412617982 and 189412618000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1155086 + ... + 1308834.

Almost surely, 2^189412618040 is an apocalyptic number.

189412618040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189412618040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224444250000).

189412618040 is an abundant number, since it is smaller than the sum of its proper divisors (259475881960).

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

189412618040 is a wasteful number, since it uses less digits than its factorization.

189412618040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155400 (or 155396 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The spelling of 189412618040 in words is "one hundred eighty-nine billion, four hundred twelve million, six hundred eighteen thousand, forty".