1599999955 has 8 divisors (see below), whose sum is σ = 1920767904. Its totient is φ = 1279488000.

The previous prime is 1599999941. The next prime is 1599999971. The reversal of 1599999955 is 5599999951.

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

It is not a de Polignac number, because 1599999955 - 2⁷ = 1599999827 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49966 + ... + 75475.

It is an arithmetic number, because the mean of its divisors is an integer number (240095988).

Almost surely, 2^1599999955 is an apocalyptic number.

1599999955 is a deficient number, since it is larger than the sum of its proper divisors (320767949).

1599999955 is a wasteful number, since it uses less digits than its factorization.

1599999955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127997.

The product of its digits is 66430125, while the sum is 70.

The square root of 1599999955 is about 39999.9994375000. Note that the first 3 decimals coincide. The cubic root of 1599999955 is about 1169.6070843201.

The spelling of 1599999955 in words is "one billion, five hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred fifty-five".