63551672345 has 24 divisors (see below), whose sum is σ = 88844216904. Its totient is φ = 43513806336.

The previous prime is 63551672329. The next prime is 63551672369. The reversal of 63551672345 is 54327615536.

It can be written as a sum of positive squares in 4 ways, for example, as 28010373769 + 35541298576 = 167363^2 + 188524^2 .

It is not a de Polignac number, because 63551672345 - 2⁴ = 63551672329 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 63551672345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25712 + ... + 357441.

It is an arithmetic number, because the mean of its divisors is an integer number (3701842371).

Almost surely, 2^63551672345 is an apocalyptic number.

It is an amenable number.

63551672345 is a deficient number, since it is larger than the sum of its proper divisors (25292544559).

63551672345 is a wasteful number, since it uses less digits than its factorization.

63551672345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383849 (or 383842 counting only the distinct ones).

The product of its digits is 2268000, while the sum is 47.

The spelling of 63551672345 in words is "sixty-three billion, five hundred fifty-one million, six hundred seventy-two thousand, three hundred forty-five".