1291813030740 has 48 divisors (see below), whose sum is σ = 3617288579520. Its totient is φ = 344463275520.

The previous prime is 1291813030733. The next prime is 1291813030769. The reversal of 1291813030740 is 470303181921.

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, 414876 + ... + 1660044.

It is an arithmetic number, because the mean of its divisors is an integer number (75360178740).

Almost surely, 2^{1291813030740} is an apocalyptic number.

1291813030740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1291813030740 is an abundant number, since it is smaller than the sum of its proper divisors (2325475548780).

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

1291813030740 is a wasteful number, since it uses less digits than its factorization.

1291813030740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262472 (or 1262470 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 1291813030740 in words is "one trillion, two hundred ninety-one billion, eight hundred thirteen million, thirty thousand, seven hundred forty".