63874729931976 has 144 divisors (see below), whose sum is σ = 178768204278300. Its totient is φ = 20603175240960.

The previous prime is 63874729931951. The next prime is 63874729931977. The reversal of 63874729931976 is 67913992747836.

It is a happy number.

63874729931976 is a `hidden beast` number, since 6 + 3 + 8 + 7 + 4 + 7 + 299 + 319 + 7 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 63359530416900 + 515199515076 = 7959870^2 + 717774^2 .

It is a super-2 number, since 2×63874729931976² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63874729931895 and 63874729931904.

It is not an unprimeable number, because it can be changed into a prime (63874729931977) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1198171210 + ... + 1198224518.

Almost surely, 2^{63874729931976} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63874729931976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89384102139150).

63874729931976 is an abundant number, since it is smaller than the sum of its proper divisors (114893474346324).

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

63874729931976 is a wasteful number, since it uses less digits than its factorization.

63874729931976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70700 (or 70662 counting only the distinct ones).

The product of its digits is 5184974592, while the sum is 81.

The spelling of 63874729931976 in words is "sixty-three trillion, eight hundred seventy-four billion, seven hundred twenty-nine million, nine hundred thirty-one thousand, nine hundred seventy-six".