77606576487 has 12 divisors (see below), whose sum is σ = 122289150984. Its totient is φ = 47034288720.

The previous prime is 77606576423. The next prime is 77606576507. The reversal of 77606576487 is 78467560677.

It is a happy number.

It is not a de Polignac number, because 77606576487 - 2⁶ = 77606576423 is a prime.

It is a super-2 number, since 2×77606576487² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77606576417) 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 11 ways as a sum of consecutive naturals, for example, 391952308 + ... + 391952505.

It is an arithmetic number, because the mean of its divisors is an integer number (10190762582).

Almost surely, 2^77606576487 is an apocalyptic number.

77606576487 is a deficient number, since it is larger than the sum of its proper divisors (44682574497).

77606576487 is a wasteful number, since it uses less digits than its factorization.

77606576487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783904830 (or 783904827 counting only the distinct ones).

The product of its (nonzero) digits is 82978560, while the sum is 63.

The spelling of 77606576487 in words is "seventy-seven billion, six hundred six million, five hundred seventy-six thousand, four hundred eighty-seven".