63491163834 has 16 divisors (see below), whose sum is σ = 145122660288. Its totient is φ = 18140332512.

The previous prime is 63491163821. The next prime is 63491163871. The reversal of 63491163834 is 43836119436.

It is a super-2 number, since 2×63491163834² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 755847147 + ... + 755847230.

It is an arithmetic number, because the mean of its divisors is an integer number (9070166268).

Almost surely, 2^63491163834 is an apocalyptic number.

63491163834 is an abundant number, since it is smaller than the sum of its proper divisors (81631496454).

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

63491163834 is a wasteful number, since it uses less digits than its factorization.

63491163834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511694389.

The product of its digits is 1119744, while the sum is 48.

The spelling of 63491163834 in words is "sixty-three billion, four hundred ninety-one million, one hundred sixty-three thousand, eight hundred thirty-four".