245420240155 has 32 divisors (see below), whose sum is σ = 329296181760. Its totient is φ = 174498117120.

The previous prime is 245420240101. The next prime is 245420240159. The reversal of 245420240155 is 551042024542.

It is not a de Polignac number, because 245420240155 - 2²⁵ = 245386685723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245420240155.

It is not an unprimeable number, because it can be changed into a prime (245420240159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257952 + ... + 746578.

It is an arithmetic number, because the mean of its divisors is an integer number (10290505680).

Almost surely, 2^245420240155 is an apocalyptic number.

245420240155 is a deficient number, since it is larger than the sum of its proper divisors (83875941605).

245420240155 is a wasteful number, since it uses less digits than its factorization.

245420240155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488979.

The product of its (nonzero) digits is 64000, while the sum is 34.

Adding to 245420240155 its reverse (551042024542), we get a palindrome (796462264697).

The spelling of 245420240155 in words is "two hundred forty-five billion, four hundred twenty million, two hundred forty thousand, one hundred fifty-five".