63621067172345 has 16 divisors (see below), whose sum is σ = 76380135696768. Its totient is φ = 50873618522880.

The previous prime is 63621067172321. The next prime is 63621067172363. The reversal of 63621067172345 is 54327176012636.

It is not a de Polignac number, because 63621067172345 - 2¹² = 63621067168249 is a prime.

It is a super-2 number, since 2×63621067172345² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421097057 + ... + 421248113.

It is an arithmetic number, because the mean of its divisors is an integer number (4773758481048).

Almost surely, 2^{63621067172345} is an apocalyptic number.

It is an amenable number.

63621067172345 is a deficient number, since it is larger than the sum of its proper divisors (12759068524423).

63621067172345 is a wasteful number, since it uses less digits than its factorization.

63621067172345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188960.

The product of its (nonzero) digits is 7620480, while the sum is 53.

The spelling of 63621067172345 in words is "sixty-three trillion, six hundred twenty-one billion, sixty-seven million, one hundred seventy-two thousand, three hundred forty-five".