1989097425432 has 256 divisors, whose sum is σ = 6135841152000. Its totient is φ = 593142912000.

The previous prime is 1989097425409. The next prime is 1989097425467. The reversal of 1989097425432 is 2345247909891.

1989097425432 is a `hidden beast` number, since 1 + 9 + 8 + 90 + 97 + 4 + 25 + 432 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1989097425432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17327119 + ... + 17441537.

It is an arithmetic number, because the mean of its divisors is an integer number (23968129500).

Almost surely, 2^{1989097425432} is an apocalyptic number.

1989097425432 is a gapful number since it is divisible by the number (12) 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 1989097425432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3067920576000).

1989097425432 is an abundant number, since it is smaller than the sum of its proper divisors (4146743726568).

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

1989097425432 is a wasteful number, since it uses less digits than its factorization.

1989097425432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114639 (or 114629 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 1989097425432 in words is "one trillion, nine hundred eighty-nine billion, ninety-seven million, four hundred twenty-five thousand, four hundred thirty-two".