2645861507 has 2 divisors, whose sum is σ = 2645861508. Its totient is φ = 2645861506.

The previous prime is 2645861489. The next prime is 2645861539. The reversal of 2645861507 is 7051685462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2645861507 - 2¹² = 2645857411 is a prime.

It is a super-2 number, since 2×2645861507² = 14001166228448622098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2645867507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322930753 + 1322930754.

It is an arithmetic number, because the mean of its divisors is an integer number (1322930754).

Almost surely, 2^2645861507 is an apocalyptic number.

2645861507 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645861507 is an equidigital number, since it uses as much as digits as its factorization.

2645861507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 2645861507 is about 51437.9384015339. The cubic root of 2645861507 is about 1383.1067559360.

The spelling of 2645861507 in words is "two billion, six hundred forty-five million, eight hundred sixty-one thousand, five hundred seven".