55780407 has 12 divisors (see below), whose sum is σ = 83556200. Its totient is φ = 37186776.

The previous prime is 55780397. The next prime is 55780411. The reversal of 55780407 is 70408755.

55780407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55780407 - 2⁴ = 55780391 is a prime.

It is a super-2 number, since 2×55780407² = 6222907610171298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55780477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114532 + ... + 115017.

Almost surely, 2^55780407 is an apocalyptic number.

55780407 is a deficient number, since it is larger than the sum of its proper divisors (27775793).

55780407 is an equidigital number, since it uses as much as digits as its factorization.

55780407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229564 (or 229552 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 55780407 is about 7468.6281872912. The cubic root of 55780407 is about 382.0855025477.

The spelling of 55780407 in words is "fifty-five million, seven hundred eighty thousand, four hundred seven".