63478777787436 has 48 divisors (see below), whose sum is σ = 161598816263808. Its totient is φ = 19234032220800.

The previous prime is 63478777787317. The next prime is 63478777787459.

63478777787436 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×63478777787436² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23213145 + ... + 25803248.

It is an arithmetic number, because the mean of its divisors is an integer number (3366642005496).

Almost surely, 2^{63478777787436} is an apocalyptic number.

63478777787436 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

63478777787436 is an abundant number, since it is smaller than the sum of its proper divisors (98120038476372).

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

63478777787436 is a wasteful number, since it uses less digits than its factorization.

63478777787436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49026222 (or 49026220 counting only the distinct ones).

The product of its digits is 39033114624, while the sum is 84.

The spelling of 63478777787436 in words is "sixty-three trillion, four hundred seventy-eight billion, seven hundred seventy-seven million, seven hundred eighty-seven thousand, four hundred thirty-six".