1491491478118 has 8 divisors (see below), whose sum is σ = 2237242410360. Its totient is φ = 745744008000.

The previous prime is 1491491478097. The next prime is 1491491478119. The reversal of 1491491478118 is 8118741941941.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491491478119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1152598 + ... + 2076406.

It is an arithmetic number, because the mean of its divisors is an integer number (279655301295).

Almost surely, 2^{1491491478118} is an apocalyptic number.

1491491478118 is a deficient number, since it is larger than the sum of its proper divisors (745750932242).

1491491478118 is an equidigital number, since it uses as much as digits as its factorization.

1491491478118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731062.

The product of its digits is 2322432, while the sum is 58.

The spelling of 1491491478118 in words is "one trillion, four hundred ninety-one billion, four hundred ninety-one million, four hundred seventy-eight thousand, one hundred eighteen".