7961722815 has 8 divisors (see below), whose sum is σ = 12738756528. Its totient is φ = 4246252160.

The previous prime is 7961722781. The next prime is 7961722831. The reversal of 7961722815 is 5182271697.

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

It is not a de Polignac number, because 7961722815 - 2⁷ = 7961722687 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265390746 + ... + 265390775.

It is an arithmetic number, because the mean of its divisors is an integer number (1592344566).

Almost surely, 2^7961722815 is an apocalyptic number.

7961722815 is a deficient number, since it is larger than the sum of its proper divisors (4777033713).

7961722815 is a wasteful number, since it uses less digits than its factorization.

7961722815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530781529.

The product of its digits is 423360, while the sum is 48.

The square root of 7961722815 is about 89228.4865667910. The cubic root of 7961722815 is about 1996.8051337156.

The spelling of 7961722815 in words is "seven billion, nine hundred sixty-one million, seven hundred twenty-two thousand, eight hundred fifteen".