100863854978 has 16 divisors (see below), whose sum is σ = 155100523776. Its totient is φ = 49168017360.

The previous prime is 100863854969. The next prime is 100863854981. The reversal of 100863854978 is 879458368001.

It is a happy number.

It is a Curzon number.

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, 1037426 + ... + 1130477.

It is an arithmetic number, because the mean of its divisors is an integer number (9693782736).

Almost surely, 2^100863854978 is an apocalyptic number.

100863854978 is a deficient number, since it is larger than the sum of its proper divisors (54236668798).

100863854978 is a wasteful number, since it uses less digits than its factorization.

100863854978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168489.

The product of its (nonzero) digits is 11612160, while the sum is 59.

The spelling of 100863854978 in words is "one hundred billion, eight hundred sixty-three million, eight hundred fifty-four thousand, nine hundred seventy-eight".