245481581816 has 32 divisors (see below), whose sum is σ = 488890617840. Its totient is φ = 115156305408.

The previous prime is 245481581801. The next prime is 245481581879. The reversal of 245481581816 is 618185184542.

It is a super-2 number, since 2×245481581816² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2803910 + ... + 2890133.

Almost surely, 2^245481581816 is an apocalyptic number.

It is an amenable number.

245481581816 is a deficient number, since it is larger than the sum of its proper divisors (243409036024).

245481581816 is a wasteful number, since it uses less digits than its factorization.

245481581816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5694383 (or 5694379 counting only the distinct ones).

The product of its digits is 2457600, while the sum is 53.

The spelling of 245481581816 in words is "two hundred forty-five billion, four hundred eighty-one million, five hundred eighty-one thousand, eight hundred sixteen".