634105243457 has 16 divisors (see below), whose sum is σ = 739579606272. Its totient is φ = 532450376640.

The previous prime is 634105243411. The next prime is 634105243469. The reversal of 634105243457 is 754342501436.

It is a de Polignac number, because none of the positive numbers 2^k-634105243457 is a prime.

It is a super-2 number, since 2×634105243457² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634105243487) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3985238 + ... + 4141295.

It is an arithmetic number, because the mean of its divisors is an integer number (46223725392).

Almost surely, 2^634105243457 is an apocalyptic number.

It is an amenable number.

634105243457 is a deficient number, since it is larger than the sum of its proper divisors (105474362815).

634105243457 is a wasteful number, since it uses less digits than its factorization.

634105243457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8126768.

The product of its (nonzero) digits is 1209600, while the sum is 44.

The spelling of 634105243457 in words is "six hundred thirty-four billion, one hundred five million, two hundred forty-three thousand, four hundred fifty-seven".