98509209780 has 24 divisors (see below), whose sum is σ = 275825787552. Its totient is φ = 26269122592.

The previous prime is 98509209739. The next prime is 98509209791. The reversal of 98509209780 is 8790290589.

It is a super-2 number, since 2×98509209780² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 98509209780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 820910022 + ... + 820910141.

It is an arithmetic number, because the mean of its divisors is an integer number (11492741148).

Almost surely, 2^98509209780 is an apocalyptic number.

It is an amenable number.

98509209780 is an abundant number, since it is smaller than the sum of its proper divisors (177316577772).

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

98509209780 is a wasteful number, since it uses less digits than its factorization.

98509209780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641820175 (or 1641820173 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 57.

The spelling of 98509209780 in words is "ninety-eight billion, five hundred nine million, two hundred nine thousand, seven hundred eighty".