245144205642 has 32 divisors (see below), whose sum is σ = 562562025984. Its totient is φ = 69762150000.

The previous prime is 245144205641. The next prime is 245144205671. The reversal of 245144205642 is 246502441542.

It is a self number, because there is not a number n which added to its sum of digits gives 245144205642.

It is not an unprimeable number, because it can be changed into a prime (245144205641) 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, 11616484 + ... + 11637567.

It is an arithmetic number, because the mean of its divisors is an integer number (17580063312).

Almost surely, 2^245144205642 is an apocalyptic number.

245144205642 is an abundant number, since it is smaller than the sum of its proper divisors (317417820342).

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

245144205642 is a wasteful number, since it uses less digits than its factorization.

245144205642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23254314.

The product of its (nonzero) digits is 307200, while the sum is 39.

The spelling of 245144205642 in words is "two hundred forty-five billion, one hundred forty-four million, two hundred five thousand, six hundred forty-two".