63729297811 has 12 divisors (see below), whose sum is σ = 67325138400. Its totient is φ = 60316660368.

The previous prime is 63729297809. The next prime is 63729297839. The reversal of 63729297811 is 11879292736.

It is a happy number.

It is not a de Polignac number, because 63729297811 - 2¹ = 63729297809 is a prime.

It is a super-2 number, since 2×63729297811² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63729297911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 290125 + ... + 460033.

It is an arithmetic number, because the mean of its divisors is an integer number (5610428200).

Almost surely, 2^63729297811 is an apocalyptic number.

63729297811 is a deficient number, since it is larger than the sum of its proper divisors (3595840589).

63729297811 is a wasteful number, since it uses less digits than its factorization.

63729297811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170986 (or 170967 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 55.

The spelling of 63729297811 in words is "sixty-three billion, seven hundred twenty-nine million, two hundred ninety-seven thousand, eight hundred eleven".