1955598669 has 6 divisors (see below), whose sum is σ = 2824753646. Its totient is φ = 1303732440.

The previous prime is 1955598599. The next prime is 1955598683. The reversal of 1955598669 is 9668955591.

1955598669 is a `hidden beast` number, since 19 + 5 + 559 + 8 + 6 + 69 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1286083044 + 669515625 = 35862^2 + 25875^2 .

It is not a de Polignac number, because 1955598669 - 2⁸ = 1955598413 is a prime.

It is a super-2 number, since 2×1955598669² = 7648732308389143122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955598269) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108644362 + ... + 108644379.

Almost surely, 2^1955598669 is an apocalyptic number.

It is an amenable number.

1955598669 is a deficient number, since it is larger than the sum of its proper divisors (869154977).

1955598669 is a wasteful number, since it uses less digits than its factorization.

1955598669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217288747 (or 217288744 counting only the distinct ones).

The product of its digits is 26244000, while the sum is 63.

The square root of 1955598669 is about 44222.1513384412. The cubic root of 1955598669 is about 1250.5274934226.

The spelling of 1955598669 in words is "one billion, nine hundred fifty-five million, five hundred ninety-eight thousand, six hundred sixty-nine".