78532883515647 has 24 divisors (see below), whose sum is σ = 123821880790608. Its totient is φ = 47567573654400.

The previous prime is 78532883515627. The next prime is 78532883515649. The reversal of 78532883515647 is 74651538823587.

It is a happy number.

78532883515647 is a `hidden beast` number, since 7 + 8 + 5 + 3 + 2 + 8 + 8 + 3 + 51 + 564 + 7 = 666.

It is not a de Polignac number, because 78532883515647 - 2¹⁰ = 78532883514623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78532883515649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234109254 + ... + 234444467.

It is an arithmetic number, because the mean of its divisors is an integer number (5159245032942).

Almost surely, 2^{78532883515647} is an apocalyptic number.

78532883515647 is a deficient number, since it is larger than the sum of its proper divisors (45288997274961).

78532883515647 is a wasteful number, since it uses less digits than its factorization.

78532883515647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468555431 (or 468555428 counting only the distinct ones).

The product of its digits is 1354752000, while the sum is 72.

The spelling of 78532883515647 in words is "seventy-eight trillion, five hundred thirty-two billion, eight hundred eighty-three million, five hundred fifteen thousand, six hundred forty-seven".