55777557745 has 48 divisors (see below), whose sum is σ = 83891677968. Its totient is φ = 35287902720.

The previous prime is 55777557739. The next prime is 55777557749. The reversal of 55777557745 is 54775577755.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 455224896 + 55322332849 = 21336^2 + 235207^2 .

It is not a de Polignac number, because 55777557745 - 2¹¹ = 55777555697 is a prime.

It is a super-2 number, since 2×55777557745² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55777557749) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 10256167 + ... + 10261603.

It is an arithmetic number, because the mean of its divisors is an integer number (1747743291).

Almost surely, 2^55777557745 is an apocalyptic number.

It is an amenable number.

55777557745 is a deficient number, since it is larger than the sum of its proper divisors (28114120223).

55777557745 is a wasteful number, since it uses less digits than its factorization.

55777557745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8690 (or 8683 counting only the distinct ones).

The product of its digits is 210087500, while the sum is 64.

The spelling of 55777557745 in words is "fifty-five billion, seven hundred seventy-seven million, five hundred fifty-seven thousand, seven hundred forty-five".