55475557771 has 8 divisors (see below), whose sum is σ = 55610730000. Its totient is φ = 55340533248.

The previous prime is 55475557747. The next prime is 55475557817. The reversal of 55475557771 is 17775557455.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55475557771 - 2⁹ = 55475557259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55475557271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734640 + ... + 806626.

It is an arithmetic number, because the mean of its divisors is an integer number (6951341250).

Almost surely, 2^55475557771 is an apocalyptic number.

55475557771 is a deficient number, since it is larger than the sum of its proper divisors (135172229).

55475557771 is a wasteful number, since it uses less digits than its factorization.

55475557771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73853.

The product of its digits is 30012500, while the sum is 58.

The spelling of 55475557771 in words is "fifty-five billion, four hundred seventy-five million, five hundred fifty-seven thousand, seven hundred seventy-one".