2509342971085 has 4 divisors (see below), whose sum is σ = 3011211565308. Its totient is φ = 2007474376864.

The previous prime is 2509342971041. The next prime is 2509342971103. The reversal of 2509342971085 is 5801792439052.

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 826233732676 + 1683109238409 = 908974^2 + 1297347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2509342971085 is a prime.

It is a Duffinian number.

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, 250934297104 + ... + 250934297113.

It is an arithmetic number, because the mean of its divisors is an integer number (752802891327).

Almost surely, 2^{2509342971085} is an apocalyptic number.

It is an amenable number.

2509342971085 is a deficient number, since it is larger than the sum of its proper divisors (501868594223).

2509342971085 is an equidigital number, since it uses as much as digits as its factorization.

2509342971085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501868594222.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 2509342971085 in words is "two trillion, five hundred nine billion, three hundred forty-two million, nine hundred seventy-one thousand, eighty-five".