634409523542 has 32 divisors (see below), whose sum is σ = 981291801600. Its totient is φ = 307495843200.

The previous prime is 634409523541. The next prime is 634409523547. The reversal of 634409523542 is 245325904436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634409523541) 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, 2586209 + ... + 2820867.

It is an arithmetic number, because the mean of its divisors is an integer number (30665368800).

Almost surely, 2^634409523542 is an apocalyptic number.

634409523542 is a deficient number, since it is larger than the sum of its proper divisors (346882278058).

634409523542 is a wasteful number, since it uses less digits than its factorization.

634409523542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235052.

The product of its (nonzero) digits is 3110400, while the sum is 47.

The spelling of 634409523542 in words is "six hundred thirty-four billion, four hundred nine million, five hundred twenty-three thousand, five hundred forty-two".