1989190535850 has 120 divisors (see below), whose sum is σ = 6316574650848. Its totient is φ = 454672116000.

The previous prime is 1989190535837. The next prime is 1989190535867. The reversal of 1989190535850 is 585350919891.

1989190535850 is a `hidden beast` number, since 1 + 9 + 8 + 9 + 1 + 90 + 535 + 8 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 35054376 + ... + 35111075.

Almost surely, 2^{1989190535850} is an apocalyptic number.

1989190535850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1989190535850 is an abundant number, since it is smaller than the sum of its proper divisors (4327384114998).

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

1989190535850 is a wasteful number, since it uses less digits than its factorization.

1989190535850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70165482 (or 70165468 counting only the distinct ones).

The product of its (nonzero) digits is 17496000, while the sum is 63.

The spelling of 1989190535850 in words is "one trillion, nine hundred eighty-nine billion, one hundred ninety million, five hundred thirty-five thousand, eight hundred fifty".