1955555983 has 4 divisors (see below), whose sum is σ = 1965794688. Its totient is φ = 1945317280.

The previous prime is 1955555977. The next prime is 1955556023. The reversal of 1955555983 is 3895555591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3895555591 = 41 ⋅95013551.

It is a cyclic number.

It is not a de Polignac number, because 1955555983 - 2²⁵ = 1922001551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955555683) 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, 5119066 + ... + 5119447.

It is an arithmetic number, because the mean of its divisors is an integer number (491448672).

Almost surely, 2^1955555983 is an apocalyptic number.

1955555983 is a deficient number, since it is larger than the sum of its proper divisors (10238705).

1955555983 is a wasteful number, since it uses less digits than its factorization.

1955555983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10238704.

The product of its digits is 6075000, while the sum is 55.

The square root of 1955555983 is about 44221.6687043807. The cubic root of 1955555983 is about 1250.5183946905.

The spelling of 1955555983 in words is "one billion, nine hundred fifty-five million, five hundred fifty-five thousand, nine hundred eighty-three".