90284983649889 has 32 divisors (see below), whose sum is σ = 144829576320000. Its totient is φ = 48872180741184.

The previous prime is 90284983649863. The next prime is 90284983649911. The reversal of 90284983649889 is 98894638948209.

It is not a de Polignac number, because 90284983649889 - 2⁴⁵ = 55100611561057 is a prime.

It is a super-2 number, since 2×90284983649889² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90284983649849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4019914 + ... + 14026035.

It is an arithmetic number, because the mean of its divisors is an integer number (4525924260000).

Almost surely, 2^{90284983649889} is an apocalyptic number.

It is an amenable number.

90284983649889 is a deficient number, since it is larger than the sum of its proper divisors (54544592670111).

90284983649889 is a wasteful number, since it uses less digits than its factorization.

90284983649889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18058517.

The product of its (nonzero) digits is 15479341056, while the sum is 87.

The spelling of 90284983649889 in words is "ninety trillion, two hundred eighty-four billion, nine hundred eighty-three million, six hundred forty-nine thousand, eight hundred eighty-nine".