1550900385 has 16 divisors (see below), whose sum is σ = 2757156480. Its totient is φ = 827146800.

The previous prime is 1550900371. The next prime is 1550900387. The reversal of 1550900385 is 5830090551.

It is a happy number.

It is not a de Polignac number, because 1550900385 - 2⁶ = 1550900321 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1550900387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5743941 + ... + 5744210.

It is an arithmetic number, because the mean of its divisors is an integer number (172322280).

Almost surely, 2^1550900385 is an apocalyptic number.

1550900385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1550900385 is a deficient number, since it is larger than the sum of its proper divisors (1206256095).

1550900385 is a wasteful number, since it uses less digits than its factorization.

1550900385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11488165 (or 11488159 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1550900385 is about 39381.4726108611. The cubic root of 1550900385 is about 1157.5185721946.

The spelling of 1550900385 in words is "one billion, five hundred fifty million, nine hundred thousand, three hundred eighty-five".