1989454195574 has 8 divisors (see below), whose sum is σ = 2986031379600. Its totient is φ = 994110402376.

The previous prime is 1989454195549. The next prime is 1989454195591. The reversal of 1989454195574 is 4755914549891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1989454195498 and 1989454195507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308343674 + ... + 308350125.

It is an arithmetic number, because the mean of its divisors is an integer number (373253922450).

Almost surely, 2^{1989454195574} is an apocalyptic number.

1989454195574 is a deficient number, since it is larger than the sum of its proper divisors (996577184026).

1989454195574 is a wasteful number, since it uses less digits than its factorization.

1989454195574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616695414.

The product of its digits is 326592000, while the sum is 71.

The spelling of 1989454195574 in words is "one trillion, nine hundred eighty-nine billion, four hundred fifty-four million, one hundred ninety-five thousand, five hundred seventy-four".