555797778 has 16 divisors (see below), whose sum is σ = 1123056480. Its totient is φ = 183355776.

The previous prime is 555797777. The next prime is 555797807. The reversal of 555797778 is 877797555.

It is a super-2 number, since 2×555797778² = 617822340059474568, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (555797773) 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, 476908 + ... + 478071.

It is an arithmetic number, because the mean of its divisors is an integer number (70191030).

Almost surely, 2^555797778 is an apocalyptic number.

555797778 is an abundant number, since it is smaller than the sum of its proper divisors (567258702).

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

555797778 is a wasteful number, since it uses less digits than its factorization.

555797778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955081.

The product of its digits is 21609000, while the sum is 60.

The square root of 555797778 is about 23575.3637935876. The cubic root of 555797778 is about 822.1901484675.

The spelling of 555797778 in words is "five hundred fifty-five million, seven hundred ninety-seven thousand, seven hundred seventy-eight".