55546099840 has 128 divisors (see below), whose sum is σ = 165556379520. Its totient is φ = 17313054720.

The previous prime is 55546099823. The next prime is 55546099849. The reversal of 55546099840 is 4899064555.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (55546099849) 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 15 ways as a sum of consecutive naturals, for example, 514297 + ... + 612856.

It is an arithmetic number, because the mean of its divisors is an integer number (1293409215).

Almost surely, 2^55546099840 is an apocalyptic number.

It is an amenable number.

55546099840 is an abundant number, since it is smaller than the sum of its proper divisors (110010279680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55546099840 is a wasteful number, since it uses less digits than its factorization.

55546099840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127190 (or 1127178 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 55.

The spelling of 55546099840 in words is "fifty-five billion, five hundred forty-six million, ninety-nine thousand, eight hundred forty".