142908019891 has 8 divisors (see below), whose sum is σ = 175886793824. Its totient is φ = 113070081600.

The previous prime is 142908019861. The next prime is 142908019973. The reversal of 142908019891 is 198910809241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-142908019891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142908019801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785208810 + ... + 785208991.

It is an arithmetic number, because the mean of its divisors is an integer number (21985849228).

Almost surely, 2^142908019891 is an apocalyptic number.

142908019891 is a deficient number, since it is larger than the sum of its proper divisors (32978773933).

142908019891 is a wasteful number, since it uses less digits than its factorization.

142908019891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570417821.

The product of its (nonzero) digits is 373248, while the sum is 52.

The spelling of 142908019891 in words is "one hundred forty-two billion, nine hundred eight million, nineteen thousand, eight hundred ninety-one".