98747779994 has 4 divisors (see below), whose sum is σ = 148121669994. Its totient is φ = 49373889996.

The previous prime is 98747779993. The next prime is 98747780041. The reversal of 98747779994 is 49997774789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49997774789 = 19 ⋅2631461831.

It can be written as a sum of positive squares in only one way, i.e., 86880510025 + 11867269969 = 294755^2 + 108937^2 .

It is a super-2 number, since 2×98747779994² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (98747779993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24686944997 + ... + 24686945000.

Almost surely, 2^98747779994 is an apocalyptic number.

98747779994 is a deficient number, since it is larger than the sum of its proper divisors (49373890000).

98747779994 is a wasteful number, since it uses less digits than its factorization.

98747779994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49373889999.

The product of its digits is 2016379008, while the sum is 80.

The spelling of 98747779994 in words is "ninety-eight billion, seven hundred forty-seven million, seven hundred seventy-nine thousand, nine hundred ninety-four".