77886852061 has 4 divisors (see below), whose sum is σ = 82468431612. Its totient is φ = 73305272512.

The previous prime is 77886852047. The next prime is 77886852073. The reversal of 77886852061 is 16025868877.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16025868877 = 19 ⋅843466783.

It can be written as a sum of positive squares in 2 ways, for example, as 37448055225 + 40438796836 = 193515^2 + 201094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77886852061 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77886851987 and 77886852005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77886852961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2290789750 + ... + 2290789783.

It is an arithmetic number, because the mean of its divisors is an integer number (20617107903).

Almost surely, 2^77886852061 is an apocalyptic number.

It is an amenable number.

77886852061 is a deficient number, since it is larger than the sum of its proper divisors (4581579551).

77886852061 is a wasteful number, since it uses less digits than its factorization.

77886852061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4581579550.

The product of its (nonzero) digits is 9031680, while the sum is 58.

The spelling of 77886852061 in words is "seventy-seven billion, eight hundred eighty-six million, eight hundred fifty-two thousand, sixty-one".