15764641 has 2 divisors, whose sum is σ = 15764642. Its totient is φ = 15764640.

The previous prime is 15764621. The next prime is 15764653. The reversal of 15764641 is 14646751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10265616 + 5499025 = 3204^2 + 2345^2 .

It is a cyclic number.

It is not a de Polignac number, because 15764641 - 2¹⁹ = 15240353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15764597 and 15764606.

It is not a weakly prime, because it can be changed into another prime (15764611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7882320 + 7882321.

It is an arithmetic number, because the mean of its divisors is an integer number (7882321).

Almost surely, 2^15764641 is an apocalyptic number.

It is an amenable number.

15764641 is a deficient number, since it is larger than the sum of its proper divisors (1).

15764641 is an equidigital number, since it uses as much as digits as its factorization.

15764641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 34.

The square root of 15764641 is about 3970.4711307350. The cubic root of 15764641 is about 250.7425443281.

The spelling of 15764641 in words is "fifteen million, seven hundred sixty-four thousand, six hundred forty-one".