55145440565 has 16 divisors (see below), whose sum is σ = 70074704448. Its totient is φ = 41516795136.

The previous prime is 55145440547. The next prime is 55145440577. The reversal of 55145440565 is 56504454155.

It is a cyclic number.

It is not a de Polignac number, because 55145440565 - 2¹⁶ = 55145375029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 905774 + ... + 964736.

It is an arithmetic number, because the mean of its divisors is an integer number (4379669028).

Almost surely, 2^55145440565 is an apocalyptic number.

It is an amenable number.

55145440565 is a deficient number, since it is larger than the sum of its proper divisors (14929263883).

55145440565 is a wasteful number, since it uses less digits than its factorization.

55145440565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69988.

The product of its (nonzero) digits is 1200000, while the sum is 44.

The spelling of 55145440565 in words is "fifty-five billion, one hundred forty-five million, four hundred forty thousand, five hundred sixty-five".