1955800617 has 16 divisors (see below), whose sum is σ = 2653560000. Its totient is φ = 1280981504.

The previous prime is 1955800603. The next prime is 1955800631. The reversal of 1955800617 is 7160085591.

It is an interprime number because it is at equal distance from previous prime (1955800603) and next prime (1955800631).

It is a cyclic number.

It is not a de Polignac number, because 1955800617 - 2¹¹ = 1955798569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1955800657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481009 + ... + 485057.

It is an arithmetic number, because the mean of its divisors is an integer number (165847500).

Almost surely, 2^1955800617 is an apocalyptic number.

It is an amenable number.

1955800617 is a deficient number, since it is larger than the sum of its proper divisors (697759383).

1955800617 is a wasteful number, since it uses less digits than its factorization.

1955800617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840.

The product of its (nonzero) digits is 75600, while the sum is 42.

The square root of 1955800617 is about 44224.4346148145. The cubic root of 1955800617 is about 1250.5705378430.

The spelling of 1955800617 in words is "one billion, nine hundred fifty-five million, eight hundred thousand, six hundred seventeen".