402142111144 has 8 divisors (see below), whose sum is σ = 754016458410. Its totient is φ = 201071055568.

The previous prime is 402142111141. The next prime is 402142111153. The reversal of 402142111144 is 441111241204.

It can be written as a sum of positive squares in only one way, i.e., 375683184900 + 26458926244 = 612930^2 + 162662^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (402142111141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25133881939 + ... + 25133881954.

Almost surely, 2^402142111144 is an apocalyptic number.

It is an amenable number.

402142111144 is a deficient number, since it is larger than the sum of its proper divisors (351874347266).

402142111144 is a wasteful number, since it uses less digits than its factorization.

402142111144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50267763899 (or 50267763895 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

Adding to 402142111144 its reverse (441111241204), we get a palindrome (843253352348).

The spelling of 402142111144 in words is "four hundred two billion, one hundred forty-two million, one hundred eleven thousand, one hundred forty-four".