7612138865 has 4 divisors (see below), whose sum is σ = 9134566644. Its totient is φ = 6089711088.

The previous prime is 7612138837. The next prime is 7612138873. The reversal of 7612138865 is 5688312167.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5688312167 = 5323 ⋅1068629.

It can be written as a sum of positive squares in 2 ways, for example, as 2766865201 + 4845273664 = 52601^2 + 69608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7612138865 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 761213882 + ... + 761213891.

It is an arithmetic number, because the mean of its divisors is an integer number (2283641661).

Almost surely, 2^7612138865 is an apocalyptic number.

It is an amenable number.

7612138865 is a deficient number, since it is larger than the sum of its proper divisors (1522427779).

7612138865 is a wasteful number, since it uses less digits than its factorization.

7612138865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522427778.

The product of its digits is 483840, while the sum is 47.

The square root of 7612138865 is about 87247.5722584875. The cubic root of 7612138865 is about 1967.1413497335.

The spelling of 7612138865 in words is "seven billion, six hundred twelve million, one hundred thirty-eight thousand, eight hundred sixty-five".