2616378761 has 16 divisors (see below), whose sum is σ = 2841642000. Its totient is φ = 2399674368.

The previous prime is 2616378757. The next prime is 2616378799. The reversal of 2616378761 is 1678736162.

It can be written as a sum of positive squares in 8 ways, for example, as 203604361 + 2412774400 = 14269^2 + 49120^2 .

It is a cyclic number.

It is not a de Polignac number, because 2616378761 - 2² = 2616378757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2616378361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124505 + ... + 143993.

It is an arithmetic number, because the mean of its divisors is an integer number (177602625).

Almost surely, 2^2616378761 is an apocalyptic number.

It is an amenable number.

2616378761 is a deficient number, since it is larger than the sum of its proper divisors (225263239).

2616378761 is a wasteful number, since it uses less digits than its factorization.

2616378761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19708.

The product of its digits is 508032, while the sum is 47.

The square root of 2616378761 is about 51150.5499579428. The cubic root of 2616378761 is about 1377.9502512649.

The spelling of 2616378761 in words is "two billion, six hundred sixteen million, three hundred seventy-eight thousand, seven hundred sixty-one".