641115432 has 64 divisors (see below), whose sum is σ = 1858320000. Its totient is φ = 204412032.

The previous prime is 641115413. The next prime is 641115439. The reversal of 641115432 is 234511146.

It is a happy number.

641115432 is a `hidden beast` number, since 6 + 4 + 111 + 543 + 2 = 666.

It is a super-2 number, since 2×641115432² = 822057994297093248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 641115396 and 641115405.

It is not an unprimeable number, because it can be changed into a prime (641115439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59557 + ... + 69492.

It is an arithmetic number, because the mean of its divisors is an integer number (29036250).

Almost surely, 2^641115432 is an apocalyptic number.

It is an amenable number.

641115432 is an abundant number, since it is smaller than the sum of its proper divisors (1217204568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641115432 is a wasteful number, since it uses less digits than its factorization.

641115432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129087 (or 129077 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 641115432 is about 25320.2573446638. The cubic root of 641115432 is about 862.2742365627.

Adding to 641115432 its reverse (234511146), we get a palindrome (875626578).

The spelling of 641115432 in words is "six hundred forty-one million, one hundred fifteen thousand, four hundred thirty-two".