986991057090 has 48 divisors (see below), whose sum is σ = 2567061402048. Its totient is φ = 263106881568.

The previous prime is 986991057023. The next prime is 986991057097. The reversal of 986991057090 is 90750199689.

It is not an unprimeable number, because it can be changed into a prime (986991057097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1627564 + ... + 2150103.

It is an arithmetic number, because the mean of its divisors is an integer number (53480445876).

Almost surely, 2^986991057090 is an apocalyptic number.

986991057090 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

986991057090 is an abundant number, since it is smaller than the sum of its proper divisors (1580070344958).

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

986991057090 is a wasteful number, since it uses less digits than its factorization.

986991057090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780583 (or 3780580 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 63.

The spelling of 986991057090 in words is "nine hundred eighty-six billion, nine hundred ninety-one million, fifty-seven thousand, ninety".