641602040023 has 4 divisors (see below), whose sum is σ = 733259474320. Its totient is φ = 549944605728.

The previous prime is 641602039943. The next prime is 641602040099. The reversal of 641602040023 is 320040206146.

641602040023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-641602040023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641602039973 and 641602040000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641602040923) 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, 45828717138 + ... + 45828717151.

It is an arithmetic number, because the mean of its divisors is an integer number (183314868580).

Almost surely, 2^641602040023 is an apocalyptic number.

641602040023 is a deficient number, since it is larger than the sum of its proper divisors (91657434297).

641602040023 is an equidigital number, since it uses as much as digits as its factorization.

641602040023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91657434296.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 641602040023 its reverse (320040206146), we get a palindrome (961642246169).

The spelling of 641602040023 in words is "six hundred forty-one billion, six hundred two million, forty thousand, twenty-three".