1491901443089 has 16 divisors (see below), whose sum is σ = 1581629212800. Its totient is φ = 1402393201920.

The previous prime is 1491901443061. The next prime is 1491901443091. The reversal of 1491901443089 is 9803441091941.

It is a happy number.

It is not a de Polignac number, because 1491901443089 - 2³² = 1487606475793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1491901443089.

It is not an unprimeable number, because it can be changed into a prime (1491901443689) 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, 81968012 + ... + 81986210.

It is an arithmetic number, because the mean of its divisors is an integer number (98851825800).

Almost surely, 2^{1491901443089} is an apocalyptic number.

It is an amenable number.

1491901443089 is a deficient number, since it is larger than the sum of its proper divisors (89727769711).

1491901443089 is a wasteful number, since it uses less digits than its factorization.

1491901443089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23960.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The spelling of 1491901443089 in words is "one trillion, four hundred ninety-one billion, nine hundred one million, four hundred forty-three thousand, eighty-nine".