22878323690978 has 54 divisors (see below), whose sum is σ = 41346853137603. Its totient is φ = 9466324355040.

The previous prime is 22878323690923. The next prime is 22878323691001. The reversal of 22878323690978 is 87909632387822.

It can be written as a sum of positive squares in 5 ways, for example, as 11764948020049 + 11113375670929 = 3430007^2 + 3333673^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3382183.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1373157968 + ... + 1373174628.

Almost surely, 2^{22878323690978} is an apocalyptic number.

22878323690978 is a deficient number, since it is larger than the sum of its proper divisors (18468529446625).

22878323690978 is an frugal number, since it uses more digits than its factorization.

22878323690978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33396 (or 16699 counting only the distinct ones).

The product of its (nonzero) digits is 877879296, while the sum is 74.

The spelling of 22878323690978 in words is "twenty-two trillion, eight hundred seventy-eight billion, three hundred twenty-three million, six hundred ninety thousand, nine hundred seventy-eight".