63129019631 has 4 divisors (see below), whose sum is σ = 66842491392. Its totient is φ = 59415547872.

The previous prime is 63129019579. The next prime is 63129019633. The reversal of 63129019631 is 13691092136.

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

It is a cyclic number.

It is not a de Polignac number, because 63129019631 - 2¹⁴ = 63129003247 is a prime.

It is a super-2 number, since 2×63129019631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63129019633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1856735855 + ... + 1856735888.

It is an arithmetic number, because the mean of its divisors is an integer number (16710622848).

Almost surely, 2^63129019631 is an apocalyptic number.

63129019631 is a deficient number, since it is larger than the sum of its proper divisors (3713471761).

63129019631 is a wasteful number, since it uses less digits than its factorization.

63129019631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713471760.

The product of its (nonzero) digits is 52488, while the sum is 41.

The spelling of 63129019631 in words is "sixty-three billion, one hundred twenty-nine million, nineteen thousand, six hundred thirty-one".