55640142265 has 32 divisors (see below), whose sum is σ = 72075051936. Its totient is φ = 41077370880.

The previous prime is 55640142251. The next prime is 55640142307. The reversal of 55640142265 is 56224104655.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 160579584 + 55479562681 = 12672^2 + 235541^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55640142265 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 9966775 + ... + 9972355.

It is an arithmetic number, because the mean of its divisors is an integer number (2252345373).

Almost surely, 2^55640142265 is an apocalyptic number.

It is an amenable number.

55640142265 is a deficient number, since it is larger than the sum of its proper divisors (16434909671).

55640142265 is a wasteful number, since it uses less digits than its factorization.

55640142265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7869.

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 55640142265 in words is "fifty-five billion, six hundred forty million, one hundred forty-two thousand, two hundred sixty-five".