63261009840 has 160 divisors (see below), whose sum is σ = 225088022016. Its totient is φ = 14397511680.

The previous prime is 63261009839. The next prime is 63261009863. The reversal of 63261009840 is 4890016236.

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, 310635 + ... + 472245.

Almost surely, 2^63261009840 is an apocalyptic number.

63261009840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63261009840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112544011008).

63261009840 is an abundant number, since it is smaller than the sum of its proper divisors (161827012176).

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

63261009840 is a wasteful number, since it uses less digits than its factorization.

63261009840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161867 (or 161861 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 63261009840 in words is "sixty-three billion, two hundred sixty-one million, nine thousand, eight hundred forty".