63900045578 has 4 divisors (see below), whose sum is σ = 95850068370. Its totient is φ = 31950022788.

The previous prime is 63900045557. The next prime is 63900045589. The reversal of 63900045578 is 87554000936.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 36082142209 + 27817903369 = 189953^2 + 166787^2 .

It is a super-3 number, since 3×63900045578³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15975011393 + ... + 15975011396.

Almost surely, 2^63900045578 is an apocalyptic number.

63900045578 is a deficient number, since it is larger than the sum of its proper divisors (31950022792).

63900045578 is a wasteful number, since it uses less digits than its factorization.

63900045578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31950022791.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 63900045578 in words is "sixty-three billion, nine hundred million, forty-five thousand, five hundred seventy-eight".