55775577 has 48 divisors (see below), whose sum is σ = 89702208. Its totient is φ = 30551040.

The previous prime is 55775567. The next prime is 55775579. The reversal of 55775577 is 77557755.

It is not a de Polignac number, because 55775577 - 2⁴ = 55775561 is a prime.

It is a super-2 number, since 2×55775577² = 6221829979365858, which contains 22 as substring.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55775579) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 407053 + ... + 407189.

It is an arithmetic number, because the mean of its divisors is an integer number (1868796).

Almost surely, 2^55775577 is an apocalyptic number.

It is an amenable number.

55775577 is a deficient number, since it is larger than the sum of its proper divisors (33926631).

55775577 is a wasteful number, since it uses less digits than its factorization.

55775577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 237 counting only the distinct ones).

The product of its digits is 1500625, while the sum is 48.

The square root of 55775577 is about 7468.3048277370. The cubic root of 55775577 is about 382.0744740263.

The spelling of 55775577 in words is "fifty-five million, seven hundred seventy-five thousand, five hundred seventy-seven".