245656721144 has 16 divisors (see below), whose sum is σ = 460618616520. Its totient is φ = 122825090080.

The previous prime is 245656721113. The next prime is 245656721179. The reversal of 245656721144 is 441127656542.

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 3 ways as a sum of consecutive naturals, for example, 73394 + ... + 704769.

Almost surely, 2^245656721144 is an apocalyptic number.

It is an amenable number.

245656721144 is a deficient number, since it is larger than the sum of its proper divisors (214961895376).

245656721144 is a wasteful number, since it uses less digits than its factorization.

245656721144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817630 (or 817626 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 47.

The spelling of 245656721144 in words is "two hundred forty-five billion, six hundred fifty-six million, seven hundred twenty-one thousand, one hundred forty-four".