4121636557 has 2 divisors, whose sum is σ = 4121636558. Its totient is φ = 4121636556.

The previous prime is 4121636551. The next prime is 4121636591. The reversal of 4121636557 is 7556361214.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3423303081 + 698333476 = 58509^2 + 26426^2 .

It is a cyclic number.

It is not a de Polignac number, because 4121636557 - 2²³ = 4113247949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4121636551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2060818278 + 2060818279.

It is an arithmetic number, because the mean of its divisors is an integer number (2060818279).

Almost surely, 2^4121636557 is an apocalyptic number.

It is an amenable number.

4121636557 is a deficient number, since it is larger than the sum of its proper divisors (1).

4121636557 is an equidigital number, since it uses as much as digits as its factorization.

4121636557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The square root of 4121636557 is about 64199.9731853527. The cubic root of 4121636557 is about 1603.3311531828.

The spelling of 4121636557 in words is "four billion, one hundred twenty-one million, six hundred thirty-six thousand, five hundred fifty-seven".