223690862978 has 18 divisors (see below), whose sum is σ = 368824752387. Its totient is φ = 101674320660.

The previous prime is 223690862917. The next prime is 223690863017. The reversal of 223690862978 is 879268096322.

It can be written as a sum of positive squares in only one way, i.e., 111845431489 + 111845431489 = 334433^2 + 334433^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=334433.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 223690862978.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7342325 + ... + 7372727.

Almost surely, 2^223690862978 is an apocalyptic number.

223690862978 is a deficient number, since it is larger than the sum of its proper divisors (145133889409).

223690862978 is an frugal number, since it uses more digits than its factorization.

223690862978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60830 (or 30416 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 62.

The spelling of 223690862978 in words is "two hundred twenty-three billion, six hundred ninety million, eight hundred sixty-two thousand, nine hundred seventy-eight".