1955501082217 has 4 divisors (see below), whose sum is σ = 1955640685140. Its totient is φ = 1955361479296.

The previous prime is 1955501082193. The next prime is 1955501082277. The reversal of 1955501082217 is 7122801055591.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1515745096336 + 439755985881 = 1231156^2 + 663141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1955501082217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1955501082277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69780448 + ... + 69808465.

It is an arithmetic number, because the mean of its divisors is an integer number (488910171285).

Almost surely, 2^{1955501082217} is an apocalyptic number.

It is an amenable number.

1955501082217 is a deficient number, since it is larger than the sum of its proper divisors (139602923).

1955501082217 is a wasteful number, since it uses less digits than its factorization.

1955501082217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139602922.

The product of its (nonzero) digits is 252000, while the sum is 46.

The spelling of 1955501082217 in words is "one trillion, nine hundred fifty-five billion, five hundred one million, eighty-two thousand, two hundred seventeen".