1491009876879 has 8 divisors (see below), whose sum is σ = 1988038122672. Its totient is φ = 993994107840.

The previous prime is 1491009876827. The next prime is 1491009876883. The reversal of 1491009876879 is 9786789001941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1491009876879 - 2⁷ = 1491009876751 is a prime.

It is a super-2 number, since 2×1491009876879² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491009876179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2836692 + ... + 3320969.

It is an arithmetic number, because the mean of its divisors is an integer number (248504765334).

Almost surely, 2^{1491009876879} is an apocalyptic number.

1491009876879 is a deficient number, since it is larger than the sum of its proper divisors (497028245793).

1491009876879 is an equidigital number, since it uses as much as digits as its factorization.

1491009876879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238377.

The product of its (nonzero) digits is 54867456, while the sum is 69.

The spelling of 1491009876879 in words is "one trillion, four hundred ninety-one billion, nine million, eight hundred seventy-six thousand, eight hundred seventy-nine".