100495217978 has 8 divisors (see below), whose sum is σ = 150754827540. Its totient is φ = 50243608800.

The previous prime is 100495217971. The next prime is 100495217989. The reversal of 100495217978 is 879712594001.

It can be written as a sum of positive squares in 2 ways, for example, as 99873064729 + 622153249 = 316027^2 + 24943^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (100495217971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1968593 + ... + 2018996.

Almost surely, 2^100495217978 is an apocalyptic number.

100495217978 is a deficient number, since it is larger than the sum of its proper divisors (50259609562).

100495217978 is a wasteful number, since it uses less digits than its factorization.

100495217978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000192.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The spelling of 100495217978 in words is "one hundred billion, four hundred ninety-five million, two hundred seventeen thousand, nine hundred seventy-eight".