1955799405 has 32 divisors (see below), whose sum is σ = 3973689600. Its totient is φ = 894079296.

The previous prime is 1955799389. The next prime is 1955799407. The reversal of 1955799405 is 5049975591.

It is not a de Polignac number, because 1955799405 - 2⁴ = 1955799389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955799407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1033870 + ... + 1035759.

It is an arithmetic number, because the mean of its divisors is an integer number (124177800).

Almost surely, 2^1955799405 is an apocalyptic number.

1955799405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1955799405 is an abundant number, since it is smaller than the sum of its proper divisors (2017890195).

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

1955799405 is a wasteful number, since it uses less digits than its factorization.

1955799405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069650 (or 2069644 counting only the distinct ones).

The product of its (nonzero) digits is 2551500, while the sum is 54.

The square root of 1955799405 is about 44224.4209119803. The cubic root of 1955799405 is about 1250.5702795188.

The spelling of 1955799405 in words is "one billion, nine hundred fifty-five million, seven hundred ninety-nine thousand, four hundred five".