2647040761 has 2 divisors, whose sum is σ = 2647040762. Its totient is φ = 2647040760.

The previous prime is 2647040749. The next prime is 2647040779. The reversal of 2647040761 is 1670407462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1694145600 + 952895161 = 41160^2 + 30869^2 .

It is a cyclic number.

It is not a de Polignac number, because 2647040761 - 2¹³ = 2647032569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2647040761.

It is not a weakly prime, because it can be changed into another prime (2647040701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323520380 + 1323520381.

It is an arithmetic number, because the mean of its divisors is an integer number (1323520381).

Almost surely, 2^2647040761 is an apocalyptic number.

It is an amenable number.

2647040761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2647040761 is an equidigital number, since it uses as much as digits as its factorization.

2647040761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 2647040761 is about 51449.4000062197. The cubic root of 2647040761 is about 1383.3122078482.

The spelling of 2647040761 in words is "two billion, six hundred forty-seven million, forty thousand, seven hundred sixty-one".