2538954857985 has 48 divisors (see below), whose sum is σ = 5089069976256. Its totient is φ = 1071383144832.

The previous prime is 2538954857983. The next prime is 2538954857987. The reversal of 2538954857985 is 5897584598352.

It is an interprime number because it is at equal distance from previous prime (2538954857983) and next prime (2538954857987).

It is not a de Polignac number, because 2538954857985 - 2¹ = 2538954857983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2538954857985.

It is not an unprimeable number, because it can be changed into a prime (2538954857983) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 132850459 + ... + 132869568.

It is an arithmetic number, because the mean of its divisors is an integer number (106022291172).

Almost surely, 2^{2538954857985} is an apocalyptic number.

It is an amenable number.

2538954857985 is an abundant number, since it is smaller than the sum of its proper divisors (2550115118271).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2538954857985 is a wasteful number, since it uses less digits than its factorization.

2538954857985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265720062 (or 265720055 counting only the distinct ones).

The product of its digits is 4354560000, while the sum is 78.

The spelling of 2538954857985 in words is "two trillion, five hundred thirty-eight billion, nine hundred fifty-four million, eight hundred fifty-seven thousand, nine hundred eighty-five".