5439661015 has 4 divisors (see below), whose sum is σ = 6527593224. Its totient is φ = 4351728808.

The previous prime is 5439661013. The next prime is 5439661021. The reversal of 5439661015 is 5101669345.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5439661015 - 2¹ = 5439661013 is a prime.

It is a super-2 number, since 2×5439661015² = 59179823916221660450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5439661013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543966097 + ... + 543966106.

It is an arithmetic number, because the mean of its divisors is an integer number (1631898306).

Almost surely, 2^5439661015 is an apocalyptic number.

5439661015 is a deficient number, since it is larger than the sum of its proper divisors (1087932209).

5439661015 is a wasteful number, since it uses less digits than its factorization.

5439661015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087932208.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 5439661015 is about 73754.0576171915. The cubic root of 5439661015 is about 1758.6953372391.

The spelling of 5439661015 in words is "five billion, four hundred thirty-nine million, six hundred sixty-one thousand, fifteen".