1955999598 has 64 divisors (see below), whose sum is σ = 4750133760. Its totient is φ = 524990592.

The previous prime is 1955999579. The next prime is 1955999629. The reversal of 1955999598 is 8959995591.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23365 + ... + 66767.

It is an arithmetic number, because the mean of its divisors is an integer number (74220840).

Almost surely, 2^1955999598 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1955999598, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2375066880).

1955999598 is an abundant number, since it is smaller than the sum of its proper divisors (2794134162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1955999598 is a wasteful number, since it uses less digits than its factorization.

1955999598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43481.

The product of its digits is 59049000, while the sum is 69.

The square root of 1955999598 is about 44226.6842302246. The cubic root of 1955999598 is about 1250.6129469610.

The spelling of 1955999598 in words is "one billion, nine hundred fifty-five million, nine hundred ninety-nine thousand, five hundred ninety-eight".