641961023 has 24 divisors (see below), whose sum is σ = 736873200. Its totient is φ = 558145280.

The previous prime is 641961007. The next prime is 641961043. The reversal of 641961023 is 320169146.

641961023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641961023 - 2⁴ = 641961007 is a prime.

It is a super-2 number, since 2×641961023² = 824227910102413058, which 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 (641961043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 395708 + ... + 397326.

It is an arithmetic number, because the mean of its divisors is an integer number (30703050).

Almost surely, 2^641961023 is an apocalyptic number.

641961023 is a deficient number, since it is larger than the sum of its proper divisors (94912177).

641961023 is a wasteful number, since it uses less digits than its factorization.

641961023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783 (or 1772 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 641961023 is about 25336.9497572222. The cubic root of 641961023 is about 862.6531652094.

The spelling of 641961023 in words is "six hundred forty-one million, nine hundred sixty-one thousand, twenty-three".