63547613640 has 640 divisors, whose sum is σ = 264542319360. Its totient is φ = 13349339136.

The previous prime is 63547613567. The next prime is 63547613653. The reversal of 63547613640 is 4631674536.

63547613640 is a `hidden beast` number, since 6 + 3 + 5 + 476 + 136 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 16577164 + ... + 16580996.

It is an arithmetic number, because the mean of its divisors is an integer number (413347374).

Almost surely, 2^63547613640 is an apocalyptic number.

63547613640 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 63547613640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132271159680).

63547613640 is an abundant number, since it is smaller than the sum of its proper divisors (200994705720).

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

63547613640 is a wasteful number, since it uses less digits than its factorization.

63547613640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923 (or 3910 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The spelling of 63547613640 in words is "sixty-three billion, five hundred forty-seven million, six hundred thirteen thousand, six hundred forty".