63381427155 has 80 divisors (see below), whose sum is σ = 114338657664. Its totient is φ = 33589520640.

The previous prime is 63381427133. The next prime is 63381427223. The reversal of 63381427155 is 55172418336.

It is a happy number.

63381427155 is a `hidden beast` number, since 633 + 8 + 1 + 4 + 2 + 7 + 1 + 5 + 5 = 666.

It is not a de Polignac number, because 63381427155 - 2¹⁰ = 63381426131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 63381427155.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 74303709 + ... + 74304561.

Almost surely, 2^63381427155 is an apocalyptic number.

63381427155 is a deficient number, since it is larger than the sum of its proper divisors (50957230509).

63381427155 is a wasteful number, since it uses less digits than its factorization.

63381427155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818 (or 1809 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

It can be divided in two parts, 633814 and 27155, that added together give a square (660969 = 813²).

The spelling of 63381427155 in words is "sixty-three billion, three hundred eighty-one million, four hundred twenty-seven thousand, one hundred fifty-five".