1955408401 has 8 divisors (see below), whose sum is σ = 1967430600. Its totient is φ = 1943420928.

The previous prime is 1955408383. The next prime is 1955408423. The reversal of 1955408401 is 1048045591.

It is a Cunningham number, because it is equal to 44220²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1503888400 + 451520001 = 38780^2 + 21249^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1955408401 - 2⁹ = 1955407889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1955408461) 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 7 ways as a sum of consecutive naturals, for example, 109125 + ... + 125773.

It is an arithmetic number, because the mean of its divisors is an integer number (245928825).

Almost surely, 2^1955408401 is an apocalyptic number.

It is an amenable number.

1955408401 is a deficient number, since it is larger than the sum of its proper divisors (12022199).

1955408401 is a wasteful number, since it uses less digits than its factorization.

1955408401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17363.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 1955408401 is about 44220.0000113071. Note that the first 4 decimals coincide. The cubic root of 1955408401 is about 1250.4869358368.

The spelling of 1955408401 in words is "one billion, nine hundred fifty-five million, four hundred eight thousand, four hundred one".