77060012549 has 4 divisors (see below), whose sum is σ = 82987705836. Its totient is φ = 71132319264.

The previous prime is 77060012431. The next prime is 77060012551. The reversal of 77060012549 is 94521006077.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19084041025 + 57975971524 = 138145^2 + 240782^2 .

It is a cyclic number.

It is not a de Polignac number, because 77060012549 - 2¹² = 77060008453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77060011549) 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, 2963846624 + ... + 2963846649.

It is an arithmetic number, because the mean of its divisors is an integer number (20746926459).

Almost surely, 2^77060012549 is an apocalyptic number.

It is an amenable number.

77060012549 is a deficient number, since it is larger than the sum of its proper divisors (5927693287).

77060012549 is a wasteful number, since it uses less digits than its factorization.

77060012549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5927693286.

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 77060012549 in words is "seventy-seven billion, sixty million, twelve thousand, five hundred forty-nine".