7715481047 has 4 divisors (see below), whose sum is σ = 7715756520. Its totient is φ = 7715205576.

The previous prime is 7715481023. The next prime is 7715481091. The reversal of 7715481047 is 7401845177.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7401845177 = 59 ⋅125455003.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7715481047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7715480989 and 7715481007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7715481247) 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, 90272 + ... + 153557.

It is an arithmetic number, because the mean of its divisors is an integer number (1928939130).

Almost surely, 2^7715481047 is an apocalyptic number.

7715481047 is a deficient number, since it is larger than the sum of its proper divisors (275473).

7715481047 is a wasteful number, since it uses less digits than its factorization.

7715481047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275472.

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 7715481047 is about 87837.8110326071. The cubic root of 7715481047 is about 1976.0033184085.

The spelling of 7715481047 in words is "seven billion, seven hundred fifteen million, four hundred eighty-one thousand, forty-seven".