2138552641 has 16 divisors (see below), whose sum is σ = 2190988800. Its totient is φ = 2086959168.

The previous prime is 2138552623. The next prime is 2138552671. The reversal of 2138552641 is 1462558312.

It is a cyclic number.

It is not a de Polignac number, because 2138552641 - 2¹⁷ = 2138421569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2138552641.

It is not an unprimeable number, because it can be changed into a prime (2138552671) 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, 2682855 + ... + 2683651.

It is an arithmetic number, because the mean of its divisors is an integer number (136936800).

Almost surely, 2^2138552641 is an apocalyptic number.

It is an amenable number.

2138552641 is a deficient number, since it is larger than the sum of its proper divisors (52436159).

2138552641 is a wasteful number, since it uses less digits than its factorization.

2138552641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248.

The product of its digits is 57600, while the sum is 37.

The square root of 2138552641 is about 46244.4876823173. The cubic root of 2138552641 is about 1288.3681549289.

The spelling of 2138552641 in words is "two billion, one hundred thirty-eight million, five hundred fifty-two thousand, six hundred forty-one".