4115507861 has 4 divisors (see below), whose sum is σ = 4155464352. Its totient is φ = 4075551372.

The previous prime is 4115507857. The next prime is 4115507867. The reversal of 4115507861 is 1687055114.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1687055114 = 2 ⋅843527557.

It is a cyclic number.

It is not a de Polignac number, because 4115507861 - 2² = 4115507857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4115507867) 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, 19978091 + ... + 19978296.

It is an arithmetic number, because the mean of its divisors is an integer number (1038866088).

Almost surely, 2^4115507861 is an apocalyptic number.

It is an amenable number.

4115507861 is a deficient number, since it is larger than the sum of its proper divisors (39956491).

4115507861 is a wasteful number, since it uses less digits than its factorization.

4115507861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39956490.

The product of its (nonzero) digits is 33600, while the sum is 38.

The square root of 4115507861 is about 64152.2241313581. The cubic root of 4115507861 is about 1602.5360641804.

The spelling of 4115507861 in words is "four billion, one hundred fifteen million, five hundred seven thousand, eight hundred sixty-one".