63946971733 has 4 divisors (see below), whose sum is σ = 63957198060. Its totient is φ = 63936745408.

The previous prime is 63946971727. The next prime is 63946971763. The reversal of 63946971733 is 33717964936.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47359334884 + 16587636849 = 217622^2 + 128793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63946971733 is a prime.

It is a super-2 number, since 2×63946971733² (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 (63946971763) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5103778 + ... + 5116291.

It is an arithmetic number, because the mean of its divisors is an integer number (15989299515).

Almost surely, 2^63946971733 is an apocalyptic number.

It is an amenable number.

63946971733 is a deficient number, since it is larger than the sum of its proper divisors (10226327).

63946971733 is a wasteful number, since it uses less digits than its factorization.

63946971733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10226326.

The product of its digits is 15431472, while the sum is 58.

The spelling of 63946971733 in words is "sixty-three billion, nine hundred forty-six million, nine hundred seventy-one thousand, seven hundred thirty-three".