55215405065 has 48 divisors (see below), whose sum is σ = 70741811712. Its totient is φ = 41340595968.

The previous prime is 55215404947. The next prime is 55215405071. The reversal of 55215405065 is 56050451255.

It is not a de Polignac number, because 55215405065 - 2¹⁴ = 55215388681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57099212 + ... + 57100178.

It is an arithmetic number, because the mean of its divisors is an integer number (1473787744).

Almost surely, 2^55215405065 is an apocalyptic number.

It is an amenable number.

55215405065 is a deficient number, since it is larger than the sum of its proper divisors (15526406647).

55215405065 is a wasteful number, since it uses less digits than its factorization.

55215405065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434 (or 1405 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 55215405065 in words is "fifty-five billion, two hundred fifteen million, four hundred five thousand, sixty-five".