7158509961 has 8 divisors (see below), whose sum is σ = 9558144960. Its totient is φ = 4765607472.

The previous prime is 7158509879. The next prime is 7158509983. The reversal of 7158509961 is 1699058517.

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

It is a de Polignac number, because none of the positive numbers 2^k-7158509961 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7158509861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1680645 + ... + 1684898.

It is an arithmetic number, because the mean of its divisors is an integer number (1194768120).

Almost surely, 2^7158509961 is an apocalyptic number.

It is an amenable number.

7158509961 is a deficient number, since it is larger than the sum of its proper divisors (2399634999).

7158509961 is a wasteful number, since it uses less digits than its factorization.

7158509961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366255.

The product of its (nonzero) digits is 680400, while the sum is 51.

The square root of 7158509961 is about 84607.9781167237. The cubic root of 7158509961 is about 1927.2625298884.

The spelling of 7158509961 in words is "seven billion, one hundred fifty-eight million, five hundred nine thousand, nine hundred sixty-one".