42145289890 has 32 divisors (see below), whose sum is σ = 83122645824. Its totient is φ = 15258037440.

The previous prime is 42145289839. The next prime is 42145289899. The reversal of 42145289890 is 9898254124.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (42145289899) 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, 818949 + ... + 868888.

It is an arithmetic number, because the mean of its divisors is an integer number (2597582682).

Almost surely, 2^42145289890 is an apocalyptic number.

42145289890 is a deficient number, since it is larger than the sum of its proper divisors (40977355934).

42145289890 is a wasteful number, since it uses less digits than its factorization.

42145289890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688082.

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 42145289890 in words is "forty-two billion, one hundred forty-five million, two hundred eighty-nine thousand, eight hundred ninety".