1491535152444 has 48 divisors (see below), whose sum is σ = 3611984745600. Its totient is φ = 478470638016.

The previous prime is 1491535152421. The next prime is 1491535152461. The reversal of 1491535152444 is 4442515351941.

It is a happy number.

It is a super-2 number, since 2×1491535152444² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1491535152393 and 1491535152402.

It is a congruent 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, 6873654 + ... + 7087325.

It is an arithmetic number, because the mean of its divisors is an integer number (75249682200).

Almost surely, 2^{1491535152444} is an apocalyptic number.

It is an amenable number.

1491535152444 is an abundant number, since it is smaller than the sum of its proper divisors (2120449593156).

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

1491535152444 is a wasteful number, since it uses less digits than its factorization.

1491535152444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13961322 (or 13961320 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 48.

The spelling of 1491535152444 in words is "one trillion, four hundred ninety-one billion, five hundred thirty-five million, one hundred fifty-two thousand, four hundred forty-four".