5291486261 has 2 divisors, whose sum is σ = 5291486262. Its totient is φ = 5291486260.

The previous prime is 5291486257. The next prime is 5291486279. The reversal of 5291486261 is 1626841925.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5025959236 + 265527025 = 70894^2 + 16295^2 .

It is a cyclic number.

It is not a de Polignac number, because 5291486261 - 2² = 5291486257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5291486251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2645743130 + 2645743131.

It is an arithmetic number, because the mean of its divisors is an integer number (2645743131).

Almost surely, 2^5291486261 is an apocalyptic number.

It is an amenable number.

5291486261 is a deficient number, since it is larger than the sum of its proper divisors (1).

5291486261 is an equidigital number, since it uses as much as digits as its factorization.

5291486261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 44.

The square root of 5291486261 is about 72742.6027923115. The cubic root of 5291486261 is about 1742.5793274700.

The spelling of 5291486261 in words is "five billion, two hundred ninety-one million, four hundred eighty-six thousand, two hundred sixty-one".