1581741374929 has 9 divisors (see below), whose sum is σ = 1616171888137. Its totient is φ = 1548029450164.

The previous prime is 1581741374903. The next prime is 1581741374933. The reversal of 1581741374929 is 9294731471851.

It is a happy number.

The square root of 1581741374929 is 1257673.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1581741374929 - 2¹⁷ = 1581741243857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1581741372929) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 59097252 + ... + 59124010.

Almost surely, 2^{1581741374929} is an apocalyptic number.

1581741374929 is the 1257673-rd square number.

1581741374929 is the 628837-th centered octagonal number.

It is an amenable number.

1581741374929 is a deficient number, since it is larger than the sum of its proper divisors (34430513208).

1581741374929 is an frugal number, since it uses more digits than its factorization.

1581741374929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53612 (or 26806 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 61.

The spelling of 1581741374929 in words is "one trillion, five hundred eighty-one billion, seven hundred forty-one million, three hundred seventy-four thousand, nine hundred twenty-nine".