245171964123 has 24 divisors (see below), whose sum is σ = 362847990960. Its totient is φ = 159429258240.

The previous prime is 245171964101. The next prime is 245171964127. The reversal of 245171964123 is 321469171542.

245171964123 is a `hidden beast` number, since 2 + 4 + 517 + 1 + 9 + 6 + 4 + 123 = 666.

245171964123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 245171964123 - 2⁵ = 245171964091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245171964127) 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 23 ways as a sum of consecutive naturals, for example, 1836988 + ... + 1965926.

It is an arithmetic number, because the mean of its divisors is an integer number (15118666290).

Almost surely, 2^245171964123 is an apocalyptic number.

245171964123 is a deficient number, since it is larger than the sum of its proper divisors (117676026837).

245171964123 is a wasteful number, since it uses less digits than its factorization.

245171964123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134139 (or 134136 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 245171964123 in words is "two hundred forty-five billion, one hundred seventy-one million, nine hundred sixty-four thousand, one hundred twenty-three".