2736641661 has 8 divisors (see below), whose sum is σ = 3929536800. Its totient is φ = 1684087152.

The previous prime is 2736641639. The next prime is 2736641669. The reversal of 2736641661 is 1661466372.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2736641661 - 2⁵ = 2736641629 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2736641669) 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 7 ways as a sum of consecutive naturals, for example, 35085111 + ... + 35085188.

It is an arithmetic number, because the mean of its divisors is an integer number (491192100).

Almost surely, 2^2736641661 is an apocalyptic number.

It is an amenable number.

2736641661 is a deficient number, since it is larger than the sum of its proper divisors (1192895139).

2736641661 is a wasteful number, since it uses less digits than its factorization.

2736641661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70170315.

The product of its digits is 217728, while the sum is 42.

The square root of 2736641661 is about 52312.9205932913. The cubic root of 2736641661 is about 1398.7474615279.

The spelling of 2736641661 in words is "two billion, seven hundred thirty-six million, six hundred forty-one thousand, six hundred sixty-one".