98663256778 has 8 divisors (see below), whose sum is σ = 147998150820. Its totient is φ = 49330539840.

The previous prime is 98663256761. The next prime is 98663256803. The reversal of 98663256778 is 87765236689.

It can be written as a sum of positive squares in 2 ways, for example, as 85361555889 + 13301700889 = 292167^2 + 115333^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425823 + ... + 615346.

Almost surely, 2^98663256778 is an apocalyptic number.

98663256778 is a deficient number, since it is larger than the sum of its proper divisors (49334894042).

98663256778 is a wasteful number, since it uses less digits than its factorization.

98663256778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088552.

The product of its digits is 182891520, while the sum is 67.

The spelling of 98663256778 in words is "ninety-eight billion, six hundred sixty-three million, two hundred fifty-six thousand, seven hundred seventy-eight".