142261647791 has 4 divisors (see below), whose sum is σ = 150629980032. Its totient is φ = 133893315552.

The previous prime is 142261647751. The next prime is 142261647797. The reversal of 142261647791 is 197746162241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142261647791 - 2³⁰ = 141187905967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142261647797) 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, 4184166095 + ... + 4184166128.

It is an arithmetic number, because the mean of its divisors is an integer number (37657495008).

Almost surely, 2^142261647791 is an apocalyptic number.

142261647791 is a deficient number, since it is larger than the sum of its proper divisors (8368332241).

142261647791 is an equidigital number, since it uses as much as digits as its factorization.

142261647791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8368332240.

The product of its digits is 1016064, while the sum is 50.

The spelling of 142261647791 in words is "one hundred forty-two billion, two hundred sixty-one million, six hundred forty-seven thousand, seven hundred ninety-one".