1100137661 has 6 divisors (see below), whose sum is σ = 1279752030. Its totient is φ = 942975096.

The previous prime is 1100137651. The next prime is 1100137663. The reversal of 1100137661 is 1667310011.

It can be written as a sum of positive squares in only one way, i.e., 767622436 + 332515225 = 27706^2 + 18235^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1100137661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1100137661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100137663) 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, 11225846 + ... + 11225943.

It is an arithmetic number, because the mean of its divisors is an integer number (213292005).

Almost surely, 2^1100137661 is an apocalyptic number.

It is an amenable number.

1100137661 is a deficient number, since it is larger than the sum of its proper divisors (179614369).

1100137661 is an equidigital number, since it uses as much as digits as its factorization.

1100137661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22451803 (or 22451796 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1100137661 is about 33168.3231562887. The cubic root of 1100137661 is about 1032.3231756944.

Adding to 1100137661 its reverse (1667310011), we get a palindrome (2767447672).

The spelling of 1100137661 in words is "one billion, one hundred million, one hundred thirty-seven thousand, six hundred sixty-one".