55745919 has 6 divisors (see below), whose sum is σ = 80521896. Its totient is φ = 37163940.

The previous prime is 55745903. The next prime is 55745929. The reversal of 55745919 is 91954755.

55745919 is a `hidden beast` number, since 5 + 57 + 4 + 591 + 9 = 666.

It is not a de Polignac number, because 55745919 - 2⁴ = 55745903 is a prime.

It is a super-2 number, since 2×55745919² = 6215214970309122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55745929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3096987 + ... + 3097004.

It is an arithmetic number, because the mean of its divisors is an integer number (13420316).

Almost surely, 2^55745919 is an apocalyptic number.

55745919 is a deficient number, since it is larger than the sum of its proper divisors (24775977).

55745919 is a wasteful number, since it uses less digits than its factorization.

55745919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6193997 (or 6193994 counting only the distinct ones).

The product of its digits is 283500, while the sum is 45.

The square root of 55745919 is about 7466.3189725594. The cubic root of 55745919 is about 382.0067408330.

The spelling of 55745919 in words is "fifty-five million, seven hundred forty-five thousand, nine hundred nineteen".