1491581654122 has 32 divisors (see below), whose sum is σ = 2572891218432. Its totient is φ = 635276389104.

The previous prime is 1491581654021. The next prime is 1491581654179. The reversal of 1491581654122 is 2214561851941.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45959233 + ... + 45991675.

It is an arithmetic number, because the mean of its divisors is an integer number (80402850576).

Almost surely, 2^{1491581654122} is an apocalyptic number.

1491581654122 is a deficient number, since it is larger than the sum of its proper divisors (1081309564310).

1491581654122 is a wasteful number, since it uses less digits than its factorization.

1491581654122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52762.

The product of its digits is 691200, while the sum is 49.

The spelling of 1491581654122 in words is "one trillion, four hundred ninety-one billion, five hundred eighty-one million, six hundred fifty-four thousand, one hundred twenty-two".