15764740261 has 2 divisors, whose sum is σ = 15764740262. Its totient is φ = 15764740260.

The previous prime is 15764740253. The next prime is 15764740273. The reversal of 15764740261 is 16204746751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15473867236 + 290873025 = 124394^2 + 17055^2 .

It is a cyclic number.

It is not a de Polignac number, because 15764740261 - 2³ = 15764740253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15764740231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7882370130 + 7882370131.

It is an arithmetic number, because the mean of its divisors is an integer number (7882370131).

Almost surely, 2^15764740261 is an apocalyptic number.

It is an amenable number.

15764740261 is a deficient number, since it is larger than the sum of its proper divisors (1).

15764740261 is an equidigital number, since it uses as much as digits as its factorization.

15764740261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 15764740261 in words is "fifteen billion, seven hundred sixty-four million, seven hundred forty thousand, two hundred sixty-one".