189822720780 has 432 divisors, whose sum is σ = 745487398656. Its totient is φ = 39441582720.

The previous prime is 189822720767. The next prime is 189822720799. The reversal of 189822720780 is 87027228981.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 10094547 + ... + 10113333.

Almost surely, 2^189822720780 is an apocalyptic number.

189822720780 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 189822720780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (372743699328).

189822720780 is an abundant number, since it is smaller than the sum of its proper divisors (555664677876).

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

189822720780 is a wasteful number, since it uses less digits than its factorization.

189822720780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18838 (or 18815 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The spelling of 189822720780 in words is "one hundred eighty-nine billion, eight hundred twenty-two million, seven hundred twenty thousand, seven hundred eighty".