77080145579 has 4 divisors (see below), whose sum is σ = 79566601920. Its totient is φ = 74593689240.

The previous prime is 77080145567. The next prime is 77080145581. The reversal of 77080145579 is 97554108077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97554108077 = 9839 ⋅9915043.

It is not a de Polignac number, because 77080145579 - 2¹² = 77080141483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77080145579.

It is not an unprimeable number, because it can be changed into a prime (77080745579) 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, 1243228124 + ... + 1243228185.

It is an arithmetic number, because the mean of its divisors is an integer number (19891650480).

Almost surely, 2^77080145579 is an apocalyptic number.

77080145579 is a deficient number, since it is larger than the sum of its proper divisors (2486456341).

77080145579 is a wasteful number, since it uses less digits than its factorization.

77080145579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486456340.

The product of its (nonzero) digits is 2469600, while the sum is 53.

The spelling of 77080145579 in words is "seventy-seven billion, eighty million, one hundred forty-five thousand, five hundred seventy-nine".