63971494740 has 288 divisors, whose sum is σ = 206677126656. Its totient is φ = 16600671360.

The previous prime is 63971494721. The next prime is 63971494747. The reversal of 63971494740 is 4749417936.

63971494740 is a `hidden beast` number, since 63 + 9 + 71 + 49 + 474 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63971494747) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 92577795 + ... + 92578485.

It is an arithmetic number, because the mean of its divisors is an integer number (717628912).

Almost surely, 2^63971494740 is an apocalyptic number.

63971494740 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 63971494740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103338563328).

63971494740 is an abundant number, since it is smaller than the sum of its proper divisors (142705631916).

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

63971494740 is a wasteful number, since it uses less digits than its factorization.

63971494740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201 (or 1187 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 63971494740 in words is "sixty-three billion, nine hundred seventy-one million, four hundred ninety-four thousand, seven hundred forty".