1291613261724 has 48 divisors (see below), whose sum is σ = 3348960279840. Its totient is φ = 430494900480.

The previous prime is 1291613261711. The next prime is 1291613261777. The reversal of 1291613261724 is 4271623161921.

1291613261724 is a `hidden beast` number, since 1 + 2 + 9 + 1 + 6 + 1 + 3 + 2 + 617 + 24 = 666.

It is a super-2 number, since 2×1291613261724² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1291613261724.

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, 504244 + ... + 1684484.

It is an arithmetic number, because the mean of its divisors is an integer number (69770005830).

Almost surely, 2^{1291613261724} is an apocalyptic number.

It is an amenable number.

1291613261724 is an abundant number, since it is smaller than the sum of its proper divisors (2057347018116).

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

1291613261724 is a wasteful number, since it uses less digits than its factorization.

1291613261724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190387 (or 1190379 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 1291613261724 in words is "one trillion, two hundred ninety-one billion, six hundred thirteen million, two hundred sixty-one thousand, seven hundred twenty-four".