641476771 has 4 divisors (see below), whose sum is σ = 690821152. Its totient is φ = 592132392.

The previous prime is 641476757. The next prime is 641476813. The reversal of 641476771 is 177674146.

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

It is a cyclic number.

It is not a de Polignac number, because 641476771 - 2⁷ = 641476643 is a prime.

It is a super-2 number, since 2×641476771² = 822984895465172882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641479771) 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 3 ways as a sum of consecutive naturals, for example, 24672171 + ... + 24672196.

It is an arithmetic number, because the mean of its divisors is an integer number (172705288).

Almost surely, 2^641476771 is an apocalyptic number.

641476771 is a deficient number, since it is larger than the sum of its proper divisors (49344381).

641476771 is a wasteful number, since it uses less digits than its factorization.

641476771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49344380.

The product of its digits is 197568, while the sum is 43.

The square root of 641476771 is about 25327.3917133210. The cubic root of 641476771 is about 862.4362015682.

The spelling of 641476771 in words is "six hundred forty-one million, four hundred seventy-six thousand, seven hundred seventy-one".