55775578 has 8 divisors (see below), whose sum is σ = 83760768. Its totient is φ = 27855324.

The previous prime is 55775567. The next prime is 55775579. The reversal of 55775578 is 87557755.

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

It is a super-2 number, since 2×55775578² = 6221830202468168, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 14026 + ... + 17557.

It is an arithmetic number, because the mean of its divisors is an integer number (10470096).

Almost surely, 2^55775578 is an apocalyptic number.

55775578 is a deficient number, since it is larger than the sum of its proper divisors (27985190).

55775578 is a wasteful number, since it uses less digits than its factorization.

55775578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32468.

The product of its digits is 1715000, while the sum is 49.

The square root of 55775578 is about 7468.3048946866. The cubic root of 55775578 is about 382.0744763097.

The spelling of 55775578 in words is "fifty-five million, seven hundred seventy-five thousand, five hundred seventy-eight".