2509433501685 has 32 divisors (see below), whose sum is σ = 4454341148160. Its totient is φ = 1196073076800.

The previous prime is 2509433501671. The next prime is 2509433501741. The reversal of 2509433501685 is 5861053349052.

It is not a de Polignac number, because 2509433501685 - 2⁴ = 2509433501669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128877451 + ... + 128896920.

It is an arithmetic number, because the mean of its divisors is an integer number (139198160880).

Almost surely, 2^{2509433501685} is an apocalyptic number.

It is an amenable number.

2509433501685 is a deficient number, since it is larger than the sum of its proper divisors (1944907646475).

2509433501685 is a wasteful number, since it uses less digits than its factorization.

2509433501685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257774449.

The product of its (nonzero) digits is 3888000, while the sum is 51.

The spelling of 2509433501685 in words is "two trillion, five hundred nine billion, four hundred thirty-three million, five hundred one thousand, six hundred eighty-five".