63404407507 has 4 divisors (see below), whose sum is σ = 72462180016. Its totient is φ = 54346635000.

The previous prime is 63404407447. The next prime is 63404407571. The reversal of 63404407507 is 70570440436.

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

It is not a de Polignac number, because 63404407507 - 2⁷ = 63404407379 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63404407507.

It is not an unprimeable number, because it can be changed into a prime (63404407597) 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, 4528886244 + ... + 4528886257.

It is an arithmetic number, because the mean of its divisors is an integer number (18115545004).

Almost surely, 2^63404407507 is an apocalyptic number.

63404407507 is a deficient number, since it is larger than the sum of its proper divisors (9057772509).

63404407507 is an equidigital number, since it uses as much as digits as its factorization.

63404407507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9057772508.

The product of its (nonzero) digits is 282240, while the sum is 40.

The spelling of 63404407507 in words is "sixty-three billion, four hundred four million, four hundred seven thousand, five hundred seven".