142001278566 has 32 divisors (see below), whose sum is σ = 324965955840. Its totient is φ = 40522843296.

The previous prime is 142001278501. The next prime is 142001278567. The reversal of 142001278566 is 665872100241.

It is a happy number.

It is a super-2 number, since 2×142001278566² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142001278567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2004376 + ... + 2074011.

It is an arithmetic number, because the mean of its divisors is an integer number (10155186120).

Almost surely, 2^142001278566 is an apocalyptic number.

142001278566 is an abundant number, since it is smaller than the sum of its proper divisors (182964677274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142001278566 is a wasteful number, since it uses less digits than its factorization.

142001278566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4079228.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 142001278566 in words is "one hundred forty-two billion, one million, two hundred seventy-eight thousand, five hundred sixty-six".