142444647541 has 4 divisors (see below), whose sum is σ = 162793882912. Its totient is φ = 122095412172.

The previous prime is 142444647517. The next prime is 142444647557. The reversal of 142444647541 is 145746444241.

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 142444647541 - 2¹³ = 142444639349 is a prime.

It is a super-2 number, since 2×142444647541² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142444647491 and 142444647500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142444647041) 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, 10174617675 + ... + 10174617688.

It is an arithmetic number, because the mean of its divisors is an integer number (40698470728).

Almost surely, 2^142444647541 is an apocalyptic number.

It is an amenable number.

142444647541 is a deficient number, since it is larger than the sum of its proper divisors (20349235371).

142444647541 is an equidigital number, since it uses as much as digits as its factorization.

142444647541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20349235370.

The product of its digits is 1720320, while the sum is 46.

The spelling of 142444647541 in words is "one hundred forty-two billion, four hundred forty-four million, six hundred forty-seven thousand, five hundred forty-one".