63440021106031 has 4 divisors (see below), whose sum is σ = 63527283859312. Its totient is φ = 63352758352752.

The previous prime is 63440021106001. The next prime is 63440021106043. The reversal of 63440021106031 is 13060112004436.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63440021106031 - 2⁹ = 63440021105519 is a prime.

It is a super-3 number, since 3×63440021106031³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63440021105984 and 63440021106002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63440021106001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43631375550 + ... + 43631377003.

It is an arithmetic number, because the mean of its divisors is an integer number (15881820964828).

Almost surely, 2^{63440021106031} is an apocalyptic number.

63440021106031 is a deficient number, since it is larger than the sum of its proper divisors (87262753281).

63440021106031 is an equidigital number, since it uses as much as digits as its factorization.

63440021106031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87262753280.

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 63440021106031 in words is "sixty-three trillion, four hundred forty billion, twenty-one million, one hundred six thousand, thirty-one".