245661737089 has 4 divisors (see below), whose sum is σ = 260112427524. Its totient is φ = 231211046656.

The previous prime is 245661736973. The next prime is 245661737117. The reversal of 245661737089 is 980737166542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145688782864 + 99972954225 = 381692^2 + 316185^2 .

It is a cyclic number.

It is not a de Polignac number, because 245661737089 - 2⁷ = 245661736961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245661737389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7225345192 + ... + 7225345225.

It is an arithmetic number, because the mean of its divisors is an integer number (65028106881).

It is a 1-persistent number, because it is pandigital, but 2⋅245661737089 = 491323474178 is not.

Almost surely, 2^245661737089 is an apocalyptic number.

It is an amenable number.

245661737089 is a deficient number, since it is larger than the sum of its proper divisors (14450690435).

245661737089 is a wasteful number, since it uses less digits than its factorization.

245661737089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14450690434.

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 245661737089 in words is "two hundred forty-five billion, six hundred sixty-one million, seven hundred thirty-seven thousand, eighty-nine".