55412780 has 12 divisors (see below), whose sum is σ = 116366880. Its totient is φ = 22165104.

The previous prime is 55412737. The next prime is 55412783. The reversal of 55412780 is 8721455.

It is not an unprimeable number, because it can be changed into a prime (55412783) 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 3 ways as a sum of consecutive naturals, for example, 1385300 + ... + 1385339.

It is an arithmetic number, because the mean of its divisors is an integer number (9697240).

Almost surely, 2^55412780 is an apocalyptic number.

It is an amenable number.

55412780 is an abundant number, since it is smaller than the sum of its proper divisors (60954100).

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

55412780 is a wasteful number, since it uses less digits than its factorization.

55412780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770648 (or 2770646 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 55412780 is about 7443.9760880863. The cubic root of 55412780 is about 381.2442593420.

The spelling of 55412780 in words is "fifty-five million, four hundred twelve thousand, seven hundred eighty".