1955906658 has 24 divisors (see below), whose sum is σ = 4240639728. Its totient is φ = 651531672.

The previous prime is 1955906657. The next prime is 1955906731. The reversal of 1955906658 is 8566095591.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1955906657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8260 + ... + 63087.

It is an arithmetic number, because the mean of its divisors is an integer number (176693322).

Almost surely, 2^1955906658 is an apocalyptic number.

1955906658 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1955906658 is an abundant number, since it is smaller than the sum of its proper divisors (2284733070).

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

1955906658 is a wasteful number, since it uses less digits than its factorization.

1955906658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72878 (or 72875 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 54.

The square root of 1955906658 is about 44225.6334946149. The cubic root of 1955906658 is about 1250.5931388778.

The spelling of 1955906658 in words is "one billion, nine hundred fifty-five million, nine hundred six thousand, six hundred fifty-eight".