55491749 has 8 divisors (see below), whose sum is σ = 57085728. Its totient is φ = 53902800.

The previous prime is 55491691. The next prime is 55491769. The reversal of 55491749 is 94719455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55491749 - 2¹⁶ = 55426213 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 (55491769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38174 + ... + 39600.

It is an arithmetic number, because the mean of its divisors is an integer number (7135716).

Almost surely, 2^55491749 is an apocalyptic number.

It is an amenable number.

55491749 is a deficient number, since it is larger than the sum of its proper divisors (1593979).

55491749 is a wasteful number, since it uses less digits than its factorization.

55491749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515.

The product of its digits is 226800, while the sum is 44.

The square root of 55491749 is about 7449.2784214312. The cubic root of 55491749 is about 381.4252776775.

The spelling of 55491749 in words is "fifty-five million, four hundred ninety-one thousand, seven hundred forty-nine".