7947923515 has 32 divisors (see below), whose sum is σ = 10985103360. Its totient is φ = 5407612800.

The previous prime is 7947923509. The next prime is 7947923519. The reversal of 7947923515 is 5153297497.

It is not a de Polignac number, because 7947923515 - 2¹³ = 7947915323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7947923519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3080496 + ... + 3083074.

It is an arithmetic number, because the mean of its divisors is an integer number (343284480).

Almost surely, 2^7947923515 is an apocalyptic number.

7947923515 is a deficient number, since it is larger than the sum of its proper divisors (3037179845).

7947923515 is a wasteful number, since it uses less digits than its factorization.

7947923515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243.

The product of its digits is 2381400, while the sum is 52.

The square root of 7947923515 is about 89151.1273905159. The cubic root of 7947923515 is about 1995.6508421852.

The spelling of 7947923515 in words is "seven billion, nine hundred forty-seven million, nine hundred twenty-three thousand, five hundred fifteen".