555450978 has 32 divisors (see below), whose sum is σ = 1209700800. Its totient is φ = 169356096.

The previous prime is 555450977. The next prime is 555451027. The reversal of 555450978 is 879054555.

It is a happy number.

It is a super-2 number, since 2×555450978² = 617051577922312968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (555450977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80701 + ... + 87312.

It is an arithmetic number, because the mean of its divisors is an integer number (37803150).

Almost surely, 2^555450978 is an apocalyptic number.

555450978 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

555450978 is an abundant number, since it is smaller than the sum of its proper divisors (654249822).

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

555450978 is a wasteful number, since it uses less digits than its factorization.

555450978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168066.

The product of its (nonzero) digits is 1260000, while the sum is 48.

The square root of 555450978 is about 23568.0075101821. The cubic root of 555450978 is about 822.0191061205.

The spelling of 555450978 in words is "five hundred fifty-five million, four hundred fifty thousand, nine hundred seventy-eight".