42110040402 has 20 divisors (see below), whose sum is σ = 94357683486. Its totient is φ = 14036680080.

The previous prime is 42110040397. The next prime is 42110040403. The reversal of 42110040402 is 20404001124.

It can be written as a sum of positive squares in only one way, i.e., 36092780361 + 6017260041 = 189981^2 + 77571^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (42110040403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 129969099 + ... + 129969422.

Almost surely, 2^42110040402 is an apocalyptic number.

42110040402 is an abundant number, since it is smaller than the sum of its proper divisors (52247643084).

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

42110040402 is a wasteful number, since it uses less digits than its factorization.

42110040402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259938535 (or 259938526 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 42110040402 its reverse (20404001124), we get a palindrome (62514041526).

The spelling of 42110040402 in words is "forty-two billion, one hundred ten million, forty thousand, four hundred two".