634266320549 has 4 divisors (see below), whose sum is σ = 634302600480. Its totient is φ = 634230040620.

The previous prime is 634266320491. The next prime is 634266320561. The reversal of 634266320549 is 945023662436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634266320549 is a prime.

It is a super-2 number, since 2×634266320549² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 634266320497 and 634266320506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634266320579) 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, 18113729 + ... + 18148710.

It is an arithmetic number, because the mean of its divisors is an integer number (158575650120).

Almost surely, 2^634266320549 is an apocalyptic number.

It is an amenable number.

634266320549 is a deficient number, since it is larger than the sum of its proper divisors (36279931).

634266320549 is a wasteful number, since it uses less digits than its factorization.

634266320549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36279930.

The product of its (nonzero) digits is 5598720, while the sum is 50.

The spelling of 634266320549 in words is "six hundred thirty-four billion, two hundred sixty-six million, three hundred twenty thousand, five hundred forty-nine".