642041140245 has 16 divisors (see below), whose sum is σ = 1027280829120. Its totient is φ = 342416939904.

The previous prime is 642041140243. The next prime is 642041140267. The reversal of 642041140245 is 542041140246.

It is not a de Polignac number, because 642041140245 - 2¹ = 642041140243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642041140243) 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, 900417 + ... + 1447353.

It is an arithmetic number, because the mean of its divisors is an integer number (64205051820).

Almost surely, 2^642041140245 is an apocalyptic number.

It is an amenable number.

642041140245 is a deficient number, since it is larger than the sum of its proper divisors (385239688875).

642041140245 is a wasteful number, since it uses less digits than its factorization.

642041140245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625204.

The product of its (nonzero) digits is 30720, while the sum is 33.

Subtracting from 642041140245 its reverse (542041140246), we obtain a palindrome (99999999999).

The spelling of 642041140245 in words is "six hundred forty-two billion, forty-one million, one hundred forty thousand, two hundred forty-five".