63779386645 has 8 divisors (see below), whose sum is σ = 82422592056. Its totient is φ = 47098623936.

The previous prime is 63779386633. The next prime is 63779386651. The reversal of 63779386645 is 54668397736.

63779386645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3966858289 + 59812528356 = 62983^2 + 244566^2 .

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

It is not a de Polignac number, because 63779386645 - 2⁵ = 63779386613 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 490610602 + ... + 490610731.

It is an arithmetic number, because the mean of its divisors is an integer number (10302824007).

Almost surely, 2^63779386645 is an apocalyptic number.

63779386645 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

63779386645 is a deficient number, since it is larger than the sum of its proper divisors (18643205411).

63779386645 is a wasteful number, since it uses less digits than its factorization.

63779386645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981221351.

The product of its digits is 137168640, while the sum is 64.

The spelling of 63779386645 in words is "sixty-three billion, seven hundred seventy-nine million, three hundred eighty-six thousand, six hundred forty-five".