2640430277 has 2 divisors, whose sum is σ = 2640430278. Its totient is φ = 2640430276.

The previous prime is 2640430241. The next prime is 2640430313. The reversal of 2640430277 is 7720340462.

It is a balanced prime because it is at equal distance from previous prime (2640430241) and next prime (2640430313).

It can be written as a sum of positive squares in only one way, i.e., 2556414721 + 84015556 = 50561^2 + 9166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640430277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2640630277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320215138 + 1320215139.

It is an arithmetic number, because the mean of its divisors is an integer number (1320215139).

Almost surely, 2^2640430277 is an apocalyptic number.

It is an amenable number.

2640430277 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640430277 is an equidigital number, since it uses as much as digits as its factorization.

2640430277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 35.

The square root of 2640430277 is about 51385.1172714435. The cubic root of 2640430277 is about 1382.1597276854.

The spelling of 2640430277 in words is "two billion, six hundred forty million, four hundred thirty thousand, two hundred seventy-seven".