2736018661 has 4 divisors (see below), whose sum is σ = 2794231872. Its totient is φ = 2677805452.

The previous prime is 2736018647. The next prime is 2736018667. The reversal of 2736018661 is 1668106372.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2736018661 - 2⁷ = 2736018533 is a prime.

It is a super-2 number, since 2×2736018661² = 14971596226680465842, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2736018667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29106535 + ... + 29106628.

It is an arithmetic number, because the mean of its divisors is an integer number (698557968).

Almost surely, 2^2736018661 is an apocalyptic number.

It is an amenable number.

2736018661 is a deficient number, since it is larger than the sum of its proper divisors (58213211).

2736018661 is an equidigital number, since it uses as much as digits as its factorization.

2736018661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58213210.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 2736018661 is about 52306.9657024760. The cubic root of 2736018661 is about 1398.6413112518.

The spelling of 2736018661 in words is "two billion, seven hundred thirty-six million, eighteen thousand, six hundred sixty-one".