76521132647 has 4 divisors (see below), whose sum is σ = 76521815496. Its totient is φ = 76520449800.

The previous prime is 76521132643. The next prime is 76521132679. The reversal of 76521132647 is 74623112567.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74623112567 = 6121 ⋅12191327.

It is a cyclic number.

It is not a de Polignac number, because 76521132647 - 2² = 76521132643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76521132598 and 76521132607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76521132643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129473 + ... + 412074.

It is an arithmetic number, because the mean of its divisors is an integer number (19130453874).

Almost surely, 2^76521132647 is an apocalyptic number.

76521132647 is a deficient number, since it is larger than the sum of its proper divisors (682849).

76521132647 is a wasteful number, since it uses less digits than its factorization.

76521132647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682848.

The product of its digits is 423360, while the sum is 44.

The spelling of 76521132647 in words is "seventy-six billion, five hundred twenty-one million, one hundred thirty-two thousand, six hundred forty-seven".