63815398090 has 16 divisors (see below), whose sum is σ = 114871860072. Its totient is φ = 25525238464.

The previous prime is 63815398081. The next prime is 63815398111. The reversal of 63815398090 is 9089351836.

It can be written as a sum of positive squares in 4 ways, for example, as 57164506281 + 6650891809 = 239091^2 + 81553^2 .

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, 223392 + ... + 421348.

Almost surely, 2^63815398090 is an apocalyptic number.

63815398090 is a deficient number, since it is larger than the sum of its proper divisors (51056461982).

63815398090 is a wasteful number, since it uses less digits than its factorization.

63815398090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230201.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 63815398090 in words is "sixty-three billion, eight hundred fifteen million, three hundred ninety-eight thousand, ninety".