6404554261 has 6 divisors (see below), whose sum is σ = 7450195830. Its totient is φ = 5489617896.

The previous prime is 6404554259. The next prime is 6404554319. The reversal of 6404554261 is 1624554046.

It can be written as a sum of positive squares in only one way, i.e., 6165233361 + 239320900 = 78519^2 + 15470^2 .

It is not a de Polignac number, because 6404554261 - 2¹ = 6404554259 is a prime.

It is a super-2 number, since 2×6404554261² = 82036630564186512242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6404554261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404554661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65352546 + ... + 65352643.

It is an arithmetic number, because the mean of its divisors is an integer number (1241699305).

Almost surely, 2^6404554261 is an apocalyptic number.

It is an amenable number.

6404554261 is a deficient number, since it is larger than the sum of its proper divisors (1045641569).

6404554261 is a wasteful number, since it uses less digits than its factorization.

6404554261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130705203 (or 130705196 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The square root of 6404554261 is about 80028.4590692586. The cubic root of 6404554261 is about 1857.0758250032.

The spelling of 6404554261 in words is "six billion, four hundred four million, five hundred fifty-four thousand, two hundred sixty-one".