55777557744 has 100 divisors (see below), whose sum is σ = 163381766856. Its totient is φ = 18368477568.

The previous prime is 55777557739. The next prime is 55777557749. The reversal of 55777557744 is 44775577755.

55777557744 is a `hidden beast` number, since 5 + 5 + 7 + 7 + 7 + 557 + 74 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (55777557739) and next prime (55777557749).

It is a super-2 number, since 2×55777557744² (a number of 22 digits) contains 22 as substring.

It is a zygodrome in base 10.

It is a congruent number.

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

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 151699 + ... + 366834.

Almost surely, 2^55777557744 is an apocalyptic number.

55777557744 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

55777557744 is an abundant number, since it is smaller than the sum of its proper divisors (107604209112).

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

55777557744 is a wasteful number, since it uses less digits than its factorization.

55777557744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518636 (or 518621 counting only the distinct ones).

The product of its digits is 168070000, while the sum is 63.

The spelling of 55777557744 in words is "fifty-five billion, seven hundred seventy-seven million, five hundred fifty-seven thousand, seven hundred forty-four".