55146653440 has 36 divisors (see below), whose sum is σ = 132093471384. Its totient is φ = 22058660864.

The previous prime is 55146653437. The next prime is 55146653449. The reversal of 55146653440 is 4435664155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55146653449) 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 3 ways as a sum of consecutive naturals, for example, 21540382 + ... + 21542941.

It is an arithmetic number, because the mean of its divisors is an integer number (3669263094).

Almost surely, 2^55146653440 is an apocalyptic number.

It is an amenable number.

55146653440 is an abundant number, since it is smaller than the sum of its proper divisors (76946817944).

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

55146653440 is an equidigital number, since it uses as much as digits as its factorization.

55146653440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43083344 (or 43083330 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 55146653440 in words is "fifty-five billion, one hundred forty-six million, six hundred fifty-three thousand, four hundred forty".