77477502861028 has 6 divisors (see below), whose sum is σ = 135585630006806. Its totient is φ = 38738751430512.

The previous prime is 77477502860959. The next prime is 77477502861041. The reversal of 77477502861028 is 82016820577477.

It can be written as a sum of positive squares in only one way, i.e., 75381847081984 + 2095655779044 = 8682272^2 + 1447638^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9684687857625 + ... + 9684687857632.

Almost surely, 2^{77477502861028} is an apocalyptic number.

It is an amenable number.

77477502861028 is a deficient number, since it is larger than the sum of its proper divisors (58108127145778).

77477502861028 is a wasteful number, since it uses less digits than its factorization.

77477502861028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19369375715261 (or 19369375715259 counting only the distinct ones).

The product of its (nonzero) digits is 73758720, while the sum is 64.

The spelling of 77477502861028 in words is "seventy-seven trillion, four hundred seventy-seven billion, five hundred two million, eight hundred sixty-one thousand, twenty-eight".