2636985138 has 32 divisors (see below), whose sum is σ = 5464065600. Its totient is φ = 847404096.

The previous prime is 2636985137. The next prime is 2636985139. The reversal of 2636985138 is 8315896362.

It is a happy number.

2636985138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2636985137) and next prime (2636985139).

It is not an unprimeable number, because it can be changed into a prime (2636985133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107748 + ... + 129936.

It is an arithmetic number, because the mean of its divisors is an integer number (170752050).

Almost surely, 2^2636985138 is an apocalyptic number.

2636985138 is an abundant number, since it is smaller than the sum of its proper divisors (2827080462).

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

2636985138 is a wasteful number, since it uses less digits than its factorization.

2636985138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22906.

The product of its digits is 1866240, while the sum is 51.

The square root of 2636985138 is about 51351.5835977821. The cubic root of 2636985138 is about 1381.5583351894.

The spelling of 2636985138 in words is "two billion, six hundred thirty-six million, nine hundred eighty-five thousand, one hundred thirty-eight".