142271393978 has 16 divisors (see below), whose sum is σ = 243906508800. Its totient is φ = 60970281936.

The previous prime is 142271393941. The next prime is 142271393987. The reversal of 142271393978 is 879393172241.

It is a happy number.

It is a super-2 number, since 2×142271393978² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25223 + ... + 534021.

It is an arithmetic number, because the mean of its divisors is an integer number (15244156800).

Almost surely, 2^142271393978 is an apocalyptic number.

142271393978 is a deficient number, since it is larger than the sum of its proper divisors (101635114822).

142271393978 is a wasteful number, since it uses less digits than its factorization.

142271393978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528781.

The product of its digits is 4572288, while the sum is 56.

The spelling of 142271393978 in words is "one hundred forty-two billion, two hundred seventy-one million, three hundred ninety-three thousand, nine hundred seventy-eight".