55135053440 has 32 divisors (see below), whose sum is σ = 131807238660. Its totient is φ = 22054021120.

The previous prime is 55135053427. The next prime is 55135053469. The reversal of 55135053440 is 4435053155.

It can be written as a sum of positive squares in 2 ways, for example, as 50978414656 + 4156638784 = 225784^2 + 64472^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 55135053440.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43073621 + ... + 43074900.

Almost surely, 2^55135053440 is an apocalyptic number.

It is an amenable number.

55135053440 is an abundant number, since it is smaller than the sum of its proper divisors (76672185220).

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

55135053440 is an equidigital number, since it uses as much as digits as its factorization.

55135053440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86148540 (or 86148528 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 55135053440 in words is "fifty-five billion, one hundred thirty-five million, fifty-three thousand, four hundred forty".