245623561261 has 16 divisors (see below), whose sum is σ = 265229524224. Its totient is φ = 226120031424.

The previous prime is 245623561241. The next prime is 245623561291. The reversal of 245623561261 is 162165326542.

It is a cyclic number.

It is not a de Polignac number, because 245623561261 - 2⁵ = 245623561229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245623561201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8406700 + ... + 8435866.

It is an arithmetic number, because the mean of its divisors is an integer number (16576845264).

Almost surely, 2^245623561261 is an apocalyptic number.

It is an amenable number.

245623561261 is a deficient number, since it is larger than the sum of its proper divisors (19605962963).

245623561261 is a wasteful number, since it uses less digits than its factorization.

245623561261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30900.

The product of its digits is 518400, while the sum is 43.

The spelling of 245623561261 in words is "two hundred forty-five billion, six hundred twenty-three million, five hundred sixty-one thousand, two hundred sixty-one".