7618731121 has 4 divisors (see below), whose sum is σ = 7621999092. Its totient is φ = 7615463152.

The previous prime is 7618731077. The next prime is 7618731137. The reversal of 7618731121 is 1211378167.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1211378167 = 4133 ⋅293099.

It can be written as a sum of positive squares in 2 ways, for example, as 822542400 + 6796188721 = 28680^2 + 82439^2 .

It is a cyclic number.

It is not a de Polignac number, because 7618731121 - 2³¹ = 5471247473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7618741121) 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, 1630486 + ... + 1635151.

It is an arithmetic number, because the mean of its divisors is an integer number (1905499773).

Almost surely, 2^7618731121 is an apocalyptic number.

It is an amenable number.

7618731121 is a deficient number, since it is larger than the sum of its proper divisors (3267971).

7618731121 is a wasteful number, since it uses less digits than its factorization.

7618731121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3267970.

The product of its digits is 14112, while the sum is 37.

The square root of 7618731121 is about 87285.3431052430. The cubic root of 7618731121 is about 1967.7090464047.

The spelling of 7618731121 in words is "seven billion, six hundred eighteen million, seven hundred thirty-one thousand, one hundred twenty-one".