78631632477 has 12 divisors (see below), whose sum is σ = 114213546720. Its totient is φ = 52128232008.

The previous prime is 78631632461. The next prime is 78631632491. The reversal of 78631632477 is 77423613687.

78631632477 is a `hidden beast` number, since 7 + 8 + 6 + 3 + 163 + 2 + 477 = 666.

It is not a de Polignac number, because 78631632477 - 2⁴ = 78631632461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78631632437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24402993 + ... + 24406214.

It is an arithmetic number, because the mean of its divisors is an integer number (9517795560).

Almost surely, 2^78631632477 is an apocalyptic number.

It is an amenable number.

78631632477 is a deficient number, since it is larger than the sum of its proper divisors (35581914243).

78631632477 is a wasteful number, since it uses less digits than its factorization.

78631632477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48809392 (or 48809389 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 54.

The spelling of 78631632477 in words is "seventy-eight billion, six hundred thirty-one million, six hundred thirty-two thousand, four hundred seventy-seven".