142105538649 has 4 divisors (see below), whose sum is σ = 189474051536. Its totient is φ = 94737025764.

The previous prime is 142105538647. The next prime is 142105538651. The reversal of 142105538649 is 946835501241.

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 an interprime number because it is at equal distance from previous prime (142105538647) and next prime (142105538651).

It is not a de Polignac number, because 142105538649 - 2¹ = 142105538647 is a prime.

It is a super-2 number, since 2×142105538649² (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 = 142105538598 and 142105538607.

It is not an unprimeable number, because it can be changed into a prime (142105538647) 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, 23684256439 + ... + 23684256444.

It is an arithmetic number, because the mean of its divisors is an integer number (47368512884).

Almost surely, 2^142105538649 is an apocalyptic number.

It is an amenable number.

142105538649 is a deficient number, since it is larger than the sum of its proper divisors (47368512887).

142105538649 is an equidigital number, since it uses as much as digits as its factorization.

142105538649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47368512886.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 142105538649 in words is "one hundred forty-two billion, one hundred five million, five hundred thirty-eight thousand, six hundred forty-nine".