55606777947 has 18 divisors (see below), whose sum is σ = 93434518788. Its totient is φ = 31775301432.

The previous prime is 55606777939. The next prime is 55606777979. The reversal of 55606777947 is 74977760655.

55606777947 is a `hidden beast` number, since 5 + 560 + 67 + 7 + 7 + 9 + 4 + 7 = 666.

55606777947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55606777947 - 2³ = 55606777939 is a prime.

It is a super-2 number, since 2×55606777947² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (55606775947) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 63045793 + ... + 63046674.

Almost surely, 2^55606777947 is an apocalyptic number.

55606777947 is a deficient number, since it is larger than the sum of its proper divisors (37827740841).

55606777947 is a wasteful number, since it uses less digits than its factorization.

55606777947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126092487 (or 126092477 counting only the distinct ones).

The product of its (nonzero) digits is 77792400, while the sum is 63.

The spelling of 55606777947 in words is "fifty-five billion, six hundred six million, seven hundred seventy-seven thousand, nine hundred forty-seven".