98778400249 has 4 divisors (see below), whose sum is σ = 103977263440. Its totient is φ = 93579537060.

The previous prime is 98778400177. The next prime is 98778400291. The reversal of 98778400249 is 94200487789.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 98778400249 - 2⁷ = 98778400121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 98778400193 and 98778400202.

It is not an unprimeable number, because it can be changed into a prime (98778400349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2599431567 + ... + 2599431604.

It is an arithmetic number, because the mean of its divisors is an integer number (25994315860).

Almost surely, 2^98778400249 is an apocalyptic number.

It is an amenable number.

98778400249 is a deficient number, since it is larger than the sum of its proper divisors (5198863191).

98778400249 is a wasteful number, since it uses less digits than its factorization.

98778400249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5198863190.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 98778400249 in words is "ninety-eight billion, seven hundred seventy-eight million, four hundred thousand, two hundred forty-nine".