141991644731 has 4 divisors (see below), whose sum is σ = 143028080232. Its totient is φ = 140955209232.

The previous prime is 141991644667. The next prime is 141991644737. The reversal of 141991644731 is 137446199141.

141991644731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137446199141 = 379 ⋅362654879.

It is a cyclic number.

It is not a de Polignac number, because 141991644731 - 2⁶ = 141991644667 is a prime.

It is a super-2 number, since 2×141991644731² (a number of 23 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 141991644731.

It is not an unprimeable number, because it can be changed into a prime (141991644737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518217545 + ... + 518217818.

It is an arithmetic number, because the mean of its divisors is an integer number (35757020058).

Almost surely, 2^141991644731 is an apocalyptic number.

141991644731 is a deficient number, since it is larger than the sum of its proper divisors (1036435501).

141991644731 is a wasteful number, since it uses less digits than its factorization.

141991644731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036435500.

The product of its digits is 653184, while the sum is 50.

The spelling of 141991644731 in words is "one hundred forty-one billion, nine hundred ninety-one million, six hundred forty-four thousand, seven hundred thirty-one".