90000679018 has 8 divisors (see below), whose sum is σ = 136195718148. Its totient is φ = 44602106304.

The previous prime is 90000678967. The next prime is 90000679019. The reversal of 90000679018 is 81097600009.

It can be written as a sum of positive squares in 2 ways, for example, as 75052437849 + 14948241169 = 273957^2 + 122263^2 .

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 (90000679019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199116321 + ... + 199116772.

Almost surely, 2^90000679018 is an apocalyptic number.

90000679018 is a deficient number, since it is larger than the sum of its proper divisors (46195039130).

90000679018 is a wasteful number, since it uses less digits than its factorization.

90000679018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398233208.

The product of its (nonzero) digits is 27216, while the sum is 40.

The spelling of 90000679018 in words is "ninety billion, six hundred seventy-nine thousand, eighteen".