641138615758 has 8 divisors (see below), whose sum is σ = 961713459720. Its totient is φ = 320567462520.

The previous prime is 641138615743. The next prime is 641138615759. The reversal of 641138615758 is 857516831146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×641138615758² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641138615699 and 641138615708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641138615759) 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, 437328 + ... + 1213891.

It is an arithmetic number, because the mean of its divisors is an integer number (120214182465).

Almost surely, 2^641138615758 is an apocalyptic number.

641138615758 is a deficient number, since it is larger than the sum of its proper divisors (320574843962).

641138615758 is a wasteful number, since it uses less digits than its factorization.

641138615758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845362.

The product of its digits is 4838400, while the sum is 55.

The spelling of 641138615758 in words is "six hundred forty-one billion, one hundred thirty-eight million, six hundred fifteen thousand, seven hundred fifty-eight".