55515121705 has 16 divisors (see below), whose sum is σ = 67203918144. Its totient is φ = 44022363840.

The previous prime is 55515121699. The next prime is 55515121721. The reversal of 55515121705 is 50712151555.

55515121705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55515121705 - 2¹⁷ = 55514990633 is a prime.

It is a Duffinian 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, 526114 + ... + 622756.

It is an arithmetic number, because the mean of its divisors is an integer number (4200244884).

Almost surely, 2^55515121705 is an apocalyptic number.

It is an amenable number.

55515121705 is a deficient number, since it is larger than the sum of its proper divisors (11688796439).

55515121705 is a wasteful number, since it uses less digits than its factorization.

55515121705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97656.

The product of its (nonzero) digits is 43750, while the sum is 37.

The spelling of 55515121705 in words is "fifty-five billion, five hundred fifteen million, one hundred twenty-one thousand, seven hundred five".