2661154313 has 4 divisors (see below), whose sum is σ = 2817692820. Its totient is φ = 2504615808.

The previous prime is 2661154291. The next prime is 2661154319. The reversal of 2661154313 is 3134511662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 771339529 + 1889814784 = 27773^2 + 43472^2 .

It is a cyclic number.

It is not a de Polignac number, because 2661154313 - 2¹⁰ = 2661153289 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 2661154313.

It is not an unprimeable number, because it can be changed into a prime (2661154319) 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 3 ways as a sum of consecutive naturals, for example, 78269228 + ... + 78269261.

It is an arithmetic number, because the mean of its divisors is an integer number (704423205).

Almost surely, 2^2661154313 is an apocalyptic number.

It is an amenable number.

2661154313 is a deficient number, since it is larger than the sum of its proper divisors (156538507).

2661154313 is a wasteful number, since it uses less digits than its factorization.

2661154313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156538506.

The product of its digits is 12960, while the sum is 32.

The square root of 2661154313 is about 51586.3772036766. The cubic root of 2661154313 is about 1385.7663764126.

Adding to 2661154313 its reverse (3134511662), we get a palindrome (5795665975).

The spelling of 2661154313 in words is "two billion, six hundred sixty-one million, one hundred fifty-four thousand, three hundred thirteen".