634441621245 has 16 divisors (see below), whose sum is σ = 1059241663872. Its totient is φ = 323657174720.

The previous prime is 634441621223. The next prime is 634441621277. The reversal of 634441621245 is 542126144436.

It is not a de Polignac number, because 634441621245 - 2²¹ = 634439524093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 634441621197 and 634441621206.

It is a congruent number.

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, 919480266 + ... + 919480955.

It is an arithmetic number, because the mean of its divisors is an integer number (66202603992).

Almost surely, 2^634441621245 is an apocalyptic number.

It is an amenable number.

634441621245 is a deficient number, since it is larger than the sum of its proper divisors (424800042627).

634441621245 is a wasteful number, since it uses less digits than its factorization.

634441621245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838961252.

The product of its digits is 552960, while the sum is 42.

The spelling of 634441621245 in words is "six hundred thirty-four billion, four hundred forty-one million, six hundred twenty-one thousand, two hundred forty-five".