78632461547 has 4 divisors (see below), whose sum is σ = 79031611296. Its totient is φ = 78233311800.

The previous prime is 78632461541. The next prime is 78632461549. The reversal of 78632461547 is 74516423687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74516423687 = 757 ⋅98436491.

It is a cyclic number.

It is not a de Polignac number, because 78632461547 - 2¹⁰ = 78632460523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78632461541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199574579 + ... + 199574972.

It is an arithmetic number, because the mean of its divisors is an integer number (19757902824).

Almost surely, 2^78632461547 is an apocalyptic number.

78632461547 is a deficient number, since it is larger than the sum of its proper divisors (399149749).

78632461547 is a wasteful number, since it uses less digits than its factorization.

78632461547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399149748.

The product of its digits is 6773760, while the sum is 53.

The spelling of 78632461547 in words is "seventy-eight billion, six hundred thirty-two million, four hundred sixty-one thousand, five hundred forty-seven".