5815742421 has 4 divisors (see below), whose sum is σ = 7754323232. Its totient is φ = 3877161612.

The previous prime is 5815742333. The next prime is 5815742453. The reversal of 5815742421 is 1242475185.

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.

It is not a de Polignac number, because 5815742421 - 2¹¹ = 5815740373 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 5815742421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5815742461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969290401 + ... + 969290406.

It is an arithmetic number, because the mean of its divisors is an integer number (1938580808).

Almost surely, 2^5815742421 is an apocalyptic number.

It is an amenable number.

5815742421 is a deficient number, since it is larger than the sum of its proper divisors (1938580811).

5815742421 is a wasteful number, since it uses less digits than its factorization.

5815742421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938580810.

The product of its digits is 89600, while the sum is 39.

The square root of 5815742421 is about 76261.0150797903. The cubic root of 5815742421 is about 1798.3258529571.

The spelling of 5815742421 in words is "five billion, eight hundred fifteen million, seven hundred forty-two thousand, four hundred twenty-one".