2611113381638 has 16 divisors (see below), whose sum is σ = 3970095413760. Its totient is φ = 1287780304200.

The previous prime is 2611113381631. The next prime is 2611113381661. The reversal of 2611113381638 is 8361833111162.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2611113381631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7851668 + ... + 8177463.

It is an arithmetic number, because the mean of its divisors is an integer number (248130963360).

Almost surely, 2^{2611113381638} is an apocalyptic number.

2611113381638 is a deficient number, since it is larger than the sum of its proper divisors (1358982032122).

2611113381638 is a wasteful number, since it uses less digits than its factorization.

2611113381638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16030243.

The product of its digits is 124416, while the sum is 44.

The spelling of 2611113381638 in words is "two trillion, six hundred eleven billion, one hundred thirteen million, three hundred eighty-one thousand, six hundred thirty-eight".