55377775 has 6 divisors (see below), whose sum is σ = 68668472. Its totient is φ = 44302200.

The previous prime is 55377769. The next prime is 55377779. The reversal of 55377775 is 57777355.

It is a happy number.

It is not a de Polignac number, because 55377775 - 2¹³ = 55369583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55377779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1107531 + ... + 1107580.

Almost surely, 2^55377775 is an apocalyptic number.

55377775 is a deficient number, since it is larger than the sum of its proper divisors (13290697).

55377775 is a wasteful number, since it uses less digits than its factorization.

55377775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215121 (or 2215116 counting only the distinct ones).

The product of its digits is 900375, while the sum is 46.

The square root of 55377775 is about 7441.6244866292. The cubic root of 55377775 is about 381.1639633859.

The spelling of 55377775 in words is "fifty-five million, three hundred seventy-seven thousand, seven hundred seventy-five".