77487033078477 has 24 divisors (see below), whose sum is σ = 124170284141280. Its totient is φ = 46165874866080.

The previous prime is 77487033078463. The next prime is 77487033078493.

77487033078477 is a `hidden beast` number, since 7 + 7 + 4 + 87 + 0 + 3 + 3 + 0 + 78 + 477 = 666.

77487033078477 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 77487033078477 - 2¹⁶ = 77487033012941 is a prime.

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77487033078277) 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, 6633022158 + ... + 6633033839.

It is an arithmetic number, because the mean of its divisors is an integer number (5173761839220).

Almost surely, 2^{77487033078477} is an apocalyptic number.

It is an amenable number.

77487033078477 is a deficient number, since it is larger than the sum of its proper divisors (46683251062803).

77487033078477 is a wasteful number, since it uses less digits than its factorization.

77487033078477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13266056073 (or 13266056070 counting only the distinct ones).

The product of its (nonzero) digits is 1084253184, while the sum is 72.

The spelling of 77487033078477 in words is "seventy-seven trillion, four hundred eighty-seven billion, thirty-three million, seventy-eight thousand, four hundred seventy-seven".