1491539383506 has 16 divisors (see below), whose sum is σ = 3033639424800. Its totient is φ = 488753018208.

The previous prime is 1491539383487. The next prime is 1491539383531. The reversal of 1491539383506 is 6053839351941.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2106693691 + ... + 2106694398.

It is an arithmetic number, because the mean of its divisors is an integer number (189602464050).

Almost surely, 2^{1491539383506} is an apocalyptic number.

1491539383506 is an abundant number, since it is smaller than the sum of its proper divisors (1542100041294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1491539383506 is a wasteful number, since it uses less digits than its factorization.

1491539383506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4213388153.

The product of its (nonzero) digits is 10497600, while the sum is 57.

The spelling of 1491539383506 in words is "one trillion, four hundred ninety-one billion, five hundred thirty-nine million, three hundred eighty-three thousand, five hundred six".