260140645 has 4 divisors (see below), whose sum is σ = 312168780. Its totient is φ = 208112512.

The previous prime is 260140633. The next prime is 260140691. The reversal of 260140645 is 546041062.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97476129 + 162664516 = 9873^2 + 12754^2 .

It is a cyclic number.

It is not a de Polignac number, because 260140645 - 2¹¹ = 260138597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26014060 + ... + 26014069.

It is an arithmetic number, because the mean of its divisors is an integer number (78042195).

Almost surely, 2^260140645 is an apocalyptic number.

It is an amenable number.

260140645 is a deficient number, since it is larger than the sum of its proper divisors (52028135).

260140645 is an equidigital number, since it uses as much as digits as its factorization.

260140645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52028134.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 260140645 is about 16128.8761232765. The cubic root of 260140645 is about 638.3654946942.

The spelling of 260140645 in words is "two hundred sixty million, one hundred forty thousand, six hundred forty-five".