245661321456 has 60 divisors (see below), whose sum is σ = 727952305392. Its totient is φ = 77070217728.

The previous prime is 245661321383. The next prime is 245661321491. The reversal of 245661321456 is 654123166542.

245661321456 is a `hidden beast` number, since 2 + 4 + 5 + 6 + 613 + 21 + 4 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 50173476 + ... + 50178371.

Almost surely, 2^245661321456 is an apocalyptic number.

It is an amenable number.

245661321456 is an abundant number, since it is smaller than the sum of its proper divisors (482290983936).

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

245661321456 is a wasteful number, since it uses less digits than its factorization.

245661321456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100351878 (or 100351869 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

Adding to 245661321456 its reverse (654123166542), we get a palindrome (899784487998).

The spelling of 245661321456 in words is "two hundred forty-five billion, six hundred sixty-one million, three hundred twenty-one thousand, four hundred fifty-six".