1098700920978 has 16 divisors (see below), whose sum is σ = 2313054570720. Its totient is φ = 346958185536.

The previous prime is 1098700920907. The next prime is 1098700921009. The reversal of 1098700920978 is 8790290078901.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4818863575 + ... + 4818863802.

It is an arithmetic number, because the mean of its divisors is an integer number (144565910670).

Almost surely, 2^{1098700920978} is an apocalyptic number.

1098700920978 is an abundant number, since it is smaller than the sum of its proper divisors (1214353649742).

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

1098700920978 is a wasteful number, since it uses less digits than its factorization.

1098700920978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9637727401.

The product of its (nonzero) digits is 4572288, while the sum is 60.

The spelling of 1098700920978 in words is "one trillion, ninety-eight billion, seven hundred million, nine hundred twenty thousand, nine hundred seventy-eight".