63715428973 has 12 divisors (see below), whose sum is σ = 75925705212. Its totient is φ = 53281193280.

The previous prime is 63715428971. The next prime is 63715429003. The reversal of 63715428973 is 37982451736.

It can be written as a sum of positive squares in 2 ways, for example, as 5777976169 + 57937452804 = 76013^2 + 240702^2 .

It is not a de Polignac number, because 63715428973 - 2¹ = 63715428971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63715428971) 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, 15855490 + ... + 15859507.

It is an arithmetic number, because the mean of its divisors is an integer number (6327142101).

Almost surely, 2^63715428973 is an apocalyptic number.

It is an amenable number.

63715428973 is a deficient number, since it is larger than the sum of its proper divisors (12210276239).

63715428973 is a wasteful number, since it uses less digits than its factorization.

63715428973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31715052 (or 31715045 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 55.

The spelling of 63715428973 in words is "sixty-three billion, seven hundred fifteen million, four hundred twenty-eight thousand, nine hundred seventy-three".