63256989558 has 64 divisors (see below), whose sum is σ = 149802048000. Its totient is φ = 17423503104.

The previous prime is 63256989547. The next prime is 63256989619. The reversal of 63256989558 is 85598965236.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 763258 + ... + 842066.

It is an arithmetic number, because the mean of its divisors is an integer number (2340657000).

Almost surely, 2^63256989558 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63256989558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74901024000).

63256989558 is an abundant number, since it is smaller than the sum of its proper divisors (86545058442).

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

63256989558 is a wasteful number, since it uses less digits than its factorization.

63256989558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79509.

The product of its digits is 139968000, while the sum is 66.

The spelling of 63256989558 in words is "sixty-three billion, two hundred fifty-six million, nine hundred eighty-nine thousand, five hundred fifty-eight".