641082765 has 32 divisors (see below), whose sum is σ = 1053360000. Its totient is φ = 332743680.

The previous prime is 641082721. The next prime is 641082769. The reversal of 641082765 is 567280146.

It is not a de Polignac number, because 641082765 - 2⁸ = 641082509 is a prime.

It is a super-2 number, since 2×641082765² = 821974223160090450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641082769) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 305841 + ... + 307929.

It is an arithmetic number, because the mean of its divisors is an integer number (32917500).

Almost surely, 2^641082765 is an apocalyptic number.

It is an amenable number.

641082765 is a deficient number, since it is larger than the sum of its proper divisors (412277235).

641082765 is a wasteful number, since it uses less digits than its factorization.

641082765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 641082765 is about 25319.6122600643. The cubic root of 641082765 is about 862.2595910509.

The spelling of 641082765 in words is "six hundred forty-one million, eighty-two thousand, seven hundred sixty-five".