55740288391 has 24 divisors (see below), whose sum is σ = 59484768000. Its totient is φ = 52220486160.

The previous prime is 55740288371. The next prime is 55740288407. The reversal of 55740288391 is 19388204755.

It is a happy number.

It is not a de Polignac number, because 55740288391 - 2¹⁹ = 55739764103 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 (55740288301) 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 23 ways as a sum of consecutive naturals, for example, 13596460 + ... + 13600558.

It is an arithmetic number, because the mean of its divisors is an integer number (2478532000).

Almost surely, 2^55740288391 is an apocalyptic number.

55740288391 is a deficient number, since it is larger than the sum of its proper divisors (3744479609).

55740288391 is a wasteful number, since it uses less digits than its factorization.

55740288391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547 (or 4528 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 55740288391 in words is "fifty-five billion, seven hundred forty million, two hundred eighty-eight thousand, three hundred ninety-one".