634361555650631 has 4 divisors (see below), whose sum is σ = 634361665471152. Its totient is φ = 634361445830112.

The previous prime is 634361555650567. The next prime is 634361555650703. The reversal of 634361555650631 is 136056555163436.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 634361555650631 - 2⁶ = 634361555650567 is a prime.

It is a super-2 number, since 2×634361555650631² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634361555650931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45734651 + ... + 57968796.

It is an arithmetic number, because the mean of its divisors is an integer number (158590416367788).

Almost surely, 2^{634361555650631} is an apocalyptic number.

634361555650631 is a deficient number, since it is larger than the sum of its proper divisors (109820521).

634361555650631 is a wasteful number, since it uses less digits than its factorization.

634361555650631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109820520.

The product of its (nonzero) digits is 87480000, while the sum is 59.

The spelling of 634361555650631 in words is "six hundred thirty-four trillion, three hundred sixty-one billion, five hundred fifty-five million, six hundred fifty thousand, six hundred thirty-one".