1581983252141 has 4 divisors (see below), whose sum is σ = 1633014969984. Its totient is φ = 1530951534300.

The previous prime is 1581983252131. The next prime is 1581983252159. The reversal of 1581983252141 is 1412523891851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1581983252141 - 2³⁰ = 1580909510317 is a prime.

It is a super-2 number, since 2×1581983252141² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1581983252141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1581983252111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25515858875 + ... + 25515858936.

It is an arithmetic number, because the mean of its divisors is an integer number (408253742496).

Almost surely, 2^{1581983252141} is an apocalyptic number.

It is an amenable number.

1581983252141 is a deficient number, since it is larger than the sum of its proper divisors (51031717843).

1581983252141 is an equidigital number, since it uses as much as digits as its factorization.

1581983252141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51031717842.

The product of its digits is 691200, while the sum is 50.

The spelling of 1581983252141 in words is "one trillion, five hundred eighty-one billion, nine hundred eighty-three million, two hundred fifty-two thousand, one hundred forty-one".