1011520650 has 96 divisors (see below), whose sum is σ = 2872816128. Its totient is φ = 230731200.

The previous prime is 1011520633. The next prime is 1011520673. The reversal of 1011520650 is 560251101.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 926605 + ... + 927695.

It is an arithmetic number, because the mean of its divisors is an integer number (29925168).

Almost surely, 2^1011520650 is an apocalyptic number.

1011520650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1011520650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1436408064).

1011520650 is an abundant number, since it is smaller than the sum of its proper divisors (1861295478).

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

1011520650 is a wasteful number, since it uses less digits than its factorization.

1011520650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996 (or 1991 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1011520650 is about 31804.4124297243. The cubic root of 1011520650 is about 1003.8255630716.

Adding to 1011520650 its reverse (560251101), we get a palindrome (1571771751).

The spelling of 1011520650 in words is "one billion, eleven million, five hundred twenty thousand, six hundred fifty".