1491100478120 has 64 divisors (see below), whose sum is σ = 3678552662400. Its totient is φ = 539465946880.

The previous prime is 1491100478107. The next prime is 1491100478123. The reversal of 1491100478120 is 218740011941.

It is not an unprimeable number, because it can be changed into a prime (1491100478123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8514500 + ... + 8687859.

It is an arithmetic number, because the mean of its divisors is an integer number (57477385350).

Almost surely, 2^{1491100478120} is an apocalyptic number.

1491100478120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1491100478120 is an abundant number, since it is smaller than the sum of its proper divisors (2187452184280).

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

1491100478120 is a wasteful number, since it uses less digits than its factorization.

1491100478120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17202578 (or 17202574 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 1491100478120 in words is "one trillion, four hundred ninety-one billion, one hundred million, four hundred seventy-eight thousand, one hundred twenty".