491404336539 has 16 divisors (see below), whose sum is σ = 659452439328. Its totient is φ = 325480027392.

The previous prime is 491404336537. The next prime is 491404336541. The reversal of 491404336539 is 935633404194.

It is an interprime number because it is at equal distance from previous prime (491404336537) and next prime (491404336541).

It is not a de Polignac number, because 491404336539 - 2¹ = 491404336537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491404336491 and 491404336500.

It is not an unprimeable number, because it can be changed into a prime (491404336537) 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, 4570669 + ... + 4676945.

It is an arithmetic number, because the mean of its divisors is an integer number (41215777458).

Almost surely, 2^491404336539 is an apocalyptic number.

491404336539 is a deficient number, since it is larger than the sum of its proper divisors (168048102789).

491404336539 is a wasteful number, since it uses less digits than its factorization.

491404336539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116254.

The product of its (nonzero) digits is 4199040, while the sum is 51.

The spelling of 491404336539 in words is "four hundred ninety-one billion, four hundred four million, three hundred thirty-six thousand, five hundred thirty-nine".