2640507377 has 2 divisors, whose sum is σ = 2640507378. Its totient is φ = 2640507376.

The previous prime is 2640507361. The next prime is 2640507409. The reversal of 2640507377 is 7737050462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1681738081 + 958769296 = 41009^2 + 30964^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640507377 - 2⁴ = 2640507361 is a prime.

It is not a weakly prime, because it can be changed into another prime (2640501377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320253688 + 1320253689.

It is an arithmetic number, because the mean of its divisors is an integer number (1320253689).

Almost surely, 2^2640507377 is an apocalyptic number.

It is an amenable number.

2640507377 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640507377 is an equidigital number, since it uses as much as digits as its factorization.

2640507377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 246960, while the sum is 41.

The square root of 2640507377 is about 51385.8674831904. The cubic root of 2640507377 is about 1382.1731804774.

The spelling of 2640507377 in words is "two billion, six hundred forty million, five hundred seven thousand, three hundred seventy-seven".