1550091801 has 32 divisors (see below), whose sum is σ = 2271184000. Its totient is φ = 936852480.

The previous prime is 1550091793. The next prime is 1550091827. The reversal of 1550091801 is 1081900551.

It is not a de Polignac number, because 1550091801 - 2³ = 1550091793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1550091701) 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 31 ways as a sum of consecutive naturals, for example, 122625 + ... + 134673.

It is an arithmetic number, because the mean of its divisors is an integer number (70974500).

Almost surely, 2^1550091801 is an apocalyptic number.

It is an amenable number.

1550091801 is a deficient number, since it is larger than the sum of its proper divisors (721092199).

1550091801 is a wasteful number, since it uses less digits than its factorization.

1550091801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12169.

The product of its (nonzero) digits is 1800, while the sum is 30.

The square root of 1550091801 is about 39371.2052266628. The cubic root of 1550091801 is about 1157.3173742947.

The spelling of 1550091801 in words is "one billion, five hundred fifty million, ninety-one thousand, eight hundred one".