1955908864 has 144 divisors (see below), whose sum is σ = 4854189312. Its totient is φ = 765886464.

The previous prime is 1955908847. The next prime is 1955908897. The reversal of 1955908864 is 4688095591.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2632077 + ... + 2632819.

It is an arithmetic number, because the mean of its divisors is an integer number (33709648).

Almost surely, 2^1955908864 is an apocalyptic number.

1955908864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1955908864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2427094656).

1955908864 is an abundant number, since it is smaller than the sum of its proper divisors (2898280448).

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

1955908864 is a wasteful number, since it uses less digits than its factorization.

1955908864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 55.

The square root of 1955908864 is about 44225.6584348950. The cubic root of 1955908864 is about 1250.5936090447.

The spelling of 1955908864 in words is "one billion, nine hundred fifty-five million, nine hundred eight thousand, eight hundred sixty-four".