991150050 has 48 divisors (see below), whose sum is σ = 2681515872. Its totient is φ = 240278400.

The previous prime is 991150049. The next prime is 991150057. The reversal of 991150050 is 50051199.

It is a super-4 number, since 4×991150050⁴ (a number of 37 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (991150057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 298699 + ... + 301998.

It is an arithmetic number, because the mean of its divisors is an integer number (55864914).

Almost surely, 2^991150050 is an apocalyptic number.

991150050 is an abundant number, since it is smaller than the sum of its proper divisors (1690365822).

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

991150050 is a wasteful number, since it uses less digits than its factorization.

991150050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600723 (or 600718 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 30.

The square root of 991150050 is about 31482.5356348564. The cubic root of 991150050 is about 997.0412712243.

The spelling of 991150050 in words is "nine hundred ninety-one million, one hundred fifty thousand, fifty".