63215903778 has 8 divisors (see below), whose sum is σ = 126431807568. Its totient is φ = 21071967924.

The previous prime is 63215903767. The next prime is 63215903783. The reversal of 63215903778 is 87730951236.

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

63215903778 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 63215903778.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5267991976 + ... + 5267991987.

It is an arithmetic number, because the mean of its divisors is an integer number (15803975946).

Almost surely, 2^63215903778 is an apocalyptic number.

63215903778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63215903778 is a wasteful number, since it uses less digits than its factorization.

63215903778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10535983968.

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 63215903778 in words is "sixty-three billion, two hundred fifteen million, nine hundred three thousand, seven hundred seventy-eight".