63431970804385 has 16 divisors (see below), whose sum is σ = 76159699200000. Its totient is φ = 50718027601216.

The previous prime is 63431970804379. The next prime is 63431970804413. The reversal of 63431970804385 is 58340807913436.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 63431970804385 - 2⁵ = 63431970804353 is a prime.

It is a super-2 number, since 2×63431970804385² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71520267 + ... + 72401743.

It is an arithmetic number, because the mean of its divisors is an integer number (4759981200000).

Almost surely, 2^{63431970804385} is an apocalyptic number.

It is an amenable number.

63431970804385 is a deficient number, since it is larger than the sum of its proper divisors (12727728395615).

63431970804385 is a wasteful number, since it uses less digits than its factorization.

63431970804385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889280.

The product of its (nonzero) digits is 52254720, while the sum is 61.

The spelling of 63431970804385 in words is "sixty-three trillion, four hundred thirty-one billion, nine hundred seventy million, eight hundred four thousand, three hundred eighty-five".