2538501985 has 4 divisors (see below), whose sum is σ = 3046202388. Its totient is φ = 2030801584.

The previous prime is 2538501967. The next prime is 2538501989. The reversal of 2538501985 is 5891058352.

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 1777128336 + 761373649 = 42156^2 + 27593^2 .

It is a cyclic number.

It is not a de Polignac number, because 2538501985 - 2¹¹ = 2538499937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2538501989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253850194 + ... + 253850203.

It is an arithmetic number, because the mean of its divisors is an integer number (761550597).

Almost surely, 2^2538501985 is an apocalyptic number.

It is an amenable number.

2538501985 is a deficient number, since it is larger than the sum of its proper divisors (507700403).

2538501985 is an equidigital number, since it uses as much as digits as its factorization.

2538501985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507700402.

The product of its (nonzero) digits is 432000, while the sum is 46.

The square root of 2538501985 is about 50383.5487535366. The cubic root of 2538501985 is about 1364.1407079941.

The spelling of 2538501985 in words is "two billion, five hundred thirty-eight million, five hundred one thousand, nine hundred eighty-five".