998749440000 has 2160 divisors, whose sum is σ = 4260763306800. Its totient is φ = 232906752000.

The previous prime is 998749439983. The next prime is 998749440011. The reversal of 998749440000 is 44947899.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (2160).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 52565759991 + ... + 52565760009.

It is an arithmetic number, because the mean of its divisors is an integer number (1972575605).

Almost surely, 2^998749440000 is an apocalyptic number.

998749440000 is a gapful number since it is divisible by the number (90) 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 998749440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2130381653400).

998749440000 is an abundant number, since it is smaller than the sum of its proper divisors (3262013866800).

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

998749440000 is an equidigital number, since it uses as much as digits as its factorization.

998749440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 998749440000 in words is "nine hundred ninety-eight billion, seven hundred forty-nine million, four hundred forty thousand".