63725517858 has 24 divisors (see below), whose sum is σ = 135389166192. Its totient is φ = 19992318784.

The previous prime is 63725517853. The next prime is 63725517883. The reversal of 63725517858 is 85871552736.

63725517858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 63725517798 and 63725517807.

It is not an unprimeable number, because it can be changed into a prime (63725517851) 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, 18373560 + ... + 18377027.

It is an arithmetic number, because the mean of its divisors is an integer number (5641215258).

Almost surely, 2^63725517858 is an apocalyptic number.

63725517858 is an abundant number, since it is smaller than the sum of its proper divisors (71663648334).

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

63725517858 is a wasteful number, since it uses less digits than its factorization.

63725517858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36750626 (or 36750609 counting only the distinct ones).

The product of its digits is 14112000, while the sum is 57.

The spelling of 63725517858 in words is "sixty-three billion, seven hundred twenty-five million, five hundred seventeen thousand, eight hundred fifty-eight".