98778940247 has 16 divisors (see below), whose sum is σ = 108449402880. Its totient is φ = 89416701792.

The previous prime is 98778940243. The next prime is 98778940279. The reversal of 98778940247 is 74204987789.

It is a cyclic number.

It is not a de Polignac number, because 98778940247 - 2² = 98778940243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98778940243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60047 + ... + 448512.

It is an arithmetic number, because the mean of its divisors is an integer number (6778087680).

Almost surely, 2^98778940247 is an apocalyptic number.

98778940247 is a deficient number, since it is larger than the sum of its proper divisors (9670462633).

98778940247 is a wasteful number, since it uses less digits than its factorization.

98778940247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508862.

The product of its (nonzero) digits is 56899584, while the sum is 65.

The spelling of 98778940247 in words is "ninety-eight billion, seven hundred seventy-eight million, nine hundred forty thousand, two hundred forty-seven".