978614575798 has 4 divisors (see below), whose sum is σ = 1467921863700. Its totient is φ = 489307287898.

The previous prime is 978614575789. The next prime is 978614575819. The reversal of 978614575798 is 897575416879.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (76) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244653643948 + ... + 244653643951.

It is an arithmetic number, because the mean of its divisors is an integer number (366980465925).

Almost surely, 2^978614575798 is an apocalyptic number.

978614575798 is a deficient number, since it is larger than the sum of its proper divisors (489307287902).

978614575798 is a wasteful number, since it uses less digits than its factorization.

978614575798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489307287901.

The product of its digits is 1066867200, while the sum is 76.

The spelling of 978614575798 in words is "nine hundred seventy-eight billion, six hundred fourteen million, five hundred seventy-five thousand, seven hundred ninety-eight".