539621879691 has 16 divisors (see below), whose sum is σ = 723530772000. Its totient is φ = 357736005888.

The previous prime is 539621879681. The next prime is 539621879707. The reversal of 539621879691 is 196978126935.

It is not a de Polignac number, because 539621879691 - 2¹⁴ = 539621863307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (539621879681) 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, 304716 + ... + 1082633.

It is an arithmetic number, because the mean of its divisors is an integer number (45220673250).

Almost surely, 2^539621879691 is an apocalyptic number.

539621879691 is a deficient number, since it is larger than the sum of its proper divisors (183908892309).

539621879691 is a wasteful number, since it uses less digits than its factorization.

539621879691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388078.

The product of its digits is 44089920, while the sum is 66.

The spelling of 539621879691 in words is "five hundred thirty-nine billion, six hundred twenty-one million, eight hundred seventy-nine thousand, six hundred ninety-one".