63735143681 has 8 divisors (see below), whose sum is σ = 70669072128. Its totient is φ = 56991186000.

The previous prime is 63735143677. The next prime is 63735143713. The reversal of 63735143681 is 18634153736.

63735143681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63735143681 - 2² = 63735143677 is a prime.

It is a super-2 number, since 2×63735143681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63735143611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47491985 + ... + 47493326.

It is an arithmetic number, because the mean of its divisors is an integer number (8833634016).

Almost surely, 2^63735143681 is an apocalyptic number.

63735143681 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

63735143681 is a deficient number, since it is larger than the sum of its proper divisors (6933928447).

63735143681 is a wasteful number, since it uses less digits than its factorization.

63735143681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94985383.

The product of its digits is 1088640, while the sum is 47.

The spelling of 63735143681 in words is "sixty-three billion, seven hundred thirty-five million, one hundred forty-three thousand, six hundred eighty-one".