98015678400978 has 96 divisors (see below), whose sum is σ = 242163830563200. Its totient is φ = 28383757751808.

The previous prime is 98015678400949. The next prime is 98015678401007. The reversal of 98015678400978 is 87900487651089.

98015678400978 is a `hidden beast` number, since 9 + 80 + 1 + 5 + 6 + 78 + 400 + 9 + 78 = 666.

It is an interprime number because it is at equal distance from previous prime (98015678400949) and next prime (98015678401007).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135045213 + ... + 135769071.

It is an arithmetic number, because the mean of its divisors is an integer number (2522539901700).

Almost surely, 2^{98015678400978} is an apocalyptic number.

98015678400978 is an abundant number, since it is smaller than the sum of its proper divisors (144148152162222).

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

98015678400978 is a wasteful number, since it uses less digits than its factorization.

98015678400978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757936 (or 757933 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 72.

The spelling of 98015678400978 in words is "ninety-eight trillion, fifteen billion, six hundred seventy-eight million, four hundred thousand, nine hundred seventy-eight".