1331091261724 has 24 divisors (see below), whose sum is σ = 2662650794720. Its totient is φ = 570367339776.

The previous prime is 1331091261671. The next prime is 1331091261727. The reversal of 1331091261724 is 4271621901331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331091261727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4018857 + ... + 4337440.

Almost surely, 2^{1331091261724} is an apocalyptic number.

1331091261724 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1331091261724 is an abundant number, since it is smaller than the sum of its proper divisors (1331559532996).

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

1331091261724 is a wasteful number, since it uses less digits than its factorization.

1331091261724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8361997 (or 8361995 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 1331091261724 in words is "one trillion, three hundred thirty-one billion, ninety-one million, two hundred sixty-one thousand, seven hundred twenty-four".