2543764651 has 2 divisors, whose sum is σ = 2543764652. Its totient is φ = 2543764650.

The previous prime is 2543764637. The next prime is 2543764693. The reversal of 2543764651 is 1564673452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2543764651 - 2¹⁹ = 2543240363 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2543764598 and 2543764607.

It is not a weakly prime, because it can be changed into another prime (2543704651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271882325 + 1271882326.

It is an arithmetic number, because the mean of its divisors is an integer number (1271882326).

Almost surely, 2^2543764651 is an apocalyptic number.

2543764651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543764651 is an equidigital number, since it uses as much as digits as its factorization.

2543764651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 43.

The square root of 2543764651 is about 50435.7477489925. The cubic root of 2543764651 is about 1365.0827414768.

The spelling of 2543764651 in words is "two billion, five hundred forty-three million, seven hundred sixty-four thousand, six hundred fifty-one".