63449491646 has 48 divisors (see below), whose sum is σ = 103613767296. Its totient is φ = 29125540224.

The previous prime is 63449491631. The next prime is 63449491691. The reversal of 63449491646 is 64619494436.

It is a junction number, because it is equal to n+sod(n) for n = 63449491591 and 63449491600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3980825 + ... + 3996731.

It is an arithmetic number, because the mean of its divisors is an integer number (2158620152).

Almost surely, 2^63449491646 is an apocalyptic number.

63449491646 is a deficient number, since it is larger than the sum of its proper divisors (40164275650).

63449491646 is a wasteful number, since it uses less digits than its factorization.

63449491646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16113 (or 16096 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 56.

The spelling of 63449491646 in words is "sixty-three billion, four hundred forty-nine million, four hundred ninety-one thousand, six hundred forty-six".