98906777820 has 144 divisors (see below), whose sum is σ = 310042107648. Its totient is φ = 25495741440.

The previous prime is 98906777813. The next prime is 98906777833. The reversal of 98906777820 is 2877760989.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5219002 + ... + 5237918.

It is an arithmetic number, because the mean of its divisors is an integer number (2153070192).

Almost surely, 2^98906777820 is an apocalyptic number.

98906777820 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 98906777820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155021053824).

98906777820 is an abundant number, since it is smaller than the sum of its proper divisors (211135329828).

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

98906777820 is a wasteful number, since it uses less digits than its factorization.

98906777820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19900 (or 19895 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 63.

The spelling of 98906777820 in words is "ninety-eight billion, nine hundred six million, seven hundred seventy-seven thousand, eight hundred twenty".