1091013650 has 12 divisors (see below), whose sum is σ = 2029285482. Its totient is φ = 436405440.

The previous prime is 1091013631. The next prime is 1091013653. The reversal of 1091013650 is 563101901.

It can be written as a sum of positive squares in 3 ways, for example, as 469458889 + 621554761 = 21667^2 + 24931^2 .

It is not an unprimeable number, because it can be changed into a prime (1091013653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10910087 + ... + 10910186.

Almost surely, 2^1091013650 is an apocalyptic number.

1091013650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1091013650 is a deficient number, since it is larger than the sum of its proper divisors (938271832).

1091013650 is a wasteful number, since it uses less digits than its factorization.

1091013650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21820285 (or 21820280 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 1091013650 is about 33030.4957577085. The cubic root of 1091013650 is about 1029.4613861602.

The spelling of 1091013650 in words is "one billion, ninety-one million, thirteen thousand, six hundred fifty".