56783553849 has 135 divisors (see below), whose sum is σ = 97740561919. Its totient is φ = 32827243680.

The previous prime is 56783553779. The next prime is 56783553857. The reversal of 56783553849 is 94835538765.

The square root of 56783553849 is 238293.

It is a perfect power (a square), and thus also a powerful number.

56783553849 is a `hidden beast` number, since 5 + 6 + 78 + 3 + 553 + 8 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29775918249 + 27007635600 = 172557^2 + 164340^2 .

It is not a de Polignac number, because 56783553849 - 2⁷ = 56783553721 is a prime.

Its product of digits (108864000) is a multiple of the sum of its prime divisors (126).

It is not an unprimeable number, because it can be changed into a prime (56783553899) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 684139162 + ... + 684139244.

Almost surely, 2^56783553849 is an apocalyptic number.

56783553849 is the 238293-rd square number.

56783553849 is the 119147-th centered octagonal number.

It is an amenable number.

56783553849 is a deficient number, since it is larger than the sum of its proper divisors (40957008070).

56783553849 is an equidigital number, since it uses as much as digits as its factorization.

56783553849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 126 counting only the distinct ones).

The product of its digits is 108864000, while the sum is 63.

The spelling of 56783553849 in words is "fifty-six billion, seven hundred eighty-three million, five hundred fifty-three thousand, eight hundred forty-nine".