189372549464 has 64 divisors (see below), whose sum is σ = 412974192960. Its totient is φ = 79727869440.

The previous prime is 189372549409. The next prime is 189372549493. The reversal of 189372549464 is 464945273981.

It is a junction number, because it is equal to n+sod(n) for n = 189372549397 and 189372549406.

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, 2687774 + ... + 2757330.

It is an arithmetic number, because the mean of its divisors is an integer number (6452721765).

Almost surely, 2^189372549464 is an apocalyptic number.

189372549464 is a gapful number since it is divisible by the number (14) 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 189372549464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206487096480).

189372549464 is an abundant number, since it is smaller than the sum of its proper divisors (223601643496).

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

189372549464 is a wasteful number, since it uses less digits than its factorization.

189372549464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70428 (or 70424 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 62.

The spelling of 189372549464 in words is "one hundred eighty-nine billion, three hundred seventy-two million, five hundred forty-nine thousand, four hundred sixty-four".