63401697507 has 16 divisors (see below), whose sum is σ = 85684055040. Its totient is φ = 41694549312.

The previous prime is 63401697431. The next prime is 63401697521. The reversal of 63401697507 is 70579610436.

It is a happy number.

It is not a de Polignac number, because 63401697507 - 2²² = 63397503203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63401697407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138058 + ... + 381920.

It is an arithmetic number, because the mean of its divisors is an integer number (5355253440).

Almost surely, 2^63401697507 is an apocalyptic number.

63401697507 is a deficient number, since it is larger than the sum of its proper divisors (22282357533).

63401697507 is a wasteful number, since it uses less digits than its factorization.

63401697507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245042.

The product of its (nonzero) digits is 952560, while the sum is 48.

The spelling of 63401697507 in words is "sixty-three billion, four hundred one million, six hundred ninety-seven thousand, five hundred seven".