641791547 has 8 divisors (see below), whose sum is σ = 666906240. Its totient is φ = 616875840.

The previous prime is 641791541. The next prime is 641791559. The reversal of 641791547 is 745197146.

641791547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 641791547 - 2¹⁶ = 641726011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641791498 and 641791507.

It is not an unprimeable number, because it can be changed into a prime (641791541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43154 + ... + 56087.

It is an arithmetic number, because the mean of its divisors is an integer number (83363280).

Almost surely, 2^641791547 is an apocalyptic number.

641791547 is a deficient number, since it is larger than the sum of its proper divisors (25114693).

641791547 is a wasteful number, since it uses less digits than its factorization.

641791547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99493.

The product of its digits is 211680, while the sum is 44.

The square root of 641791547 is about 25333.6050928406. The cubic root of 641791547 is about 862.5772458156.

The spelling of 641791547 in words is "six hundred forty-one million, seven hundred ninety-one thousand, five hundred forty-seven".