142544266649 has 4 divisors (see below), whose sum is σ = 144261667536. Its totient is φ = 140826865764.

The previous prime is 142544266609. The next prime is 142544266679. The reversal of 142544266649 is 946662445241.

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, and also an emirpimes, since its reverse is a distinct semiprime: 946662445241 = 37 ⋅25585471493.

It is a cyclic number.

It is not a de Polignac number, because 142544266649 - 2²⁸ = 142275831193 is a prime.

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 142544266649.

It is not an unprimeable number, because it can be changed into a prime (142544266609) 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, 858700319 + ... + 858700484.

It is an arithmetic number, because the mean of its divisors is an integer number (36065416884).

Almost surely, 2^142544266649 is an apocalyptic number.

It is an amenable number.

142544266649 is a deficient number, since it is larger than the sum of its proper divisors (1717400887).

142544266649 is an equidigital number, since it uses as much as digits as its factorization.

142544266649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717400886.

The product of its digits is 9953280, while the sum is 53.

The spelling of 142544266649 in words is "one hundred forty-two billion, five hundred forty-four million, two hundred sixty-six thousand, six hundred forty-nine".