1955781468 has 18 divisors (see below), whose sum is σ = 4943781024. Its totient is φ = 651927144.

The previous prime is 1955781419. The next prime is 1955781469. The reversal of 1955781468 is 8641875591.

It is a happy number.

1955781468 is a `hidden beast` number, since 1 + 9 + 5 + 578 + 1 + 4 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955781469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27163596 + ... + 27163667.

Almost surely, 2^1955781468 is an apocalyptic number.

1955781468 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1955781468 is an abundant number, since it is smaller than the sum of its proper divisors (2987999556).

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

1955781468 is a wasteful number, since it uses less digits than its factorization.

1955781468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54327273 (or 54327268 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 54.

The square root of 1955781468 is about 44224.2181163217. The cubic root of 1955781468 is about 1250.5664564362.

It can be divided in two parts, 19557 and 81468, that added together give a triangular number (101025 = T₄₄₉).

The spelling of 1955781468 in words is "one billion, nine hundred fifty-five million, seven hundred eighty-one thousand, four hundred sixty-eight".