77966173741449 has 64 divisors (see below), whose sum is σ = 122500736335872. Its totient is φ = 43189881134400.

The previous prime is 77966173741433. The next prime is 77966173741541. The reversal of 77966173741449 is 94414737166977.

It is not a de Polignac number, because 77966173741449 - 2⁴ = 77966173741433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77966173741549) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 53930254 + ... + 55357064.

It is an arithmetic number, because the mean of its divisors is an integer number (1914074005248).

Almost surely, 2^{77966173741449} is an apocalyptic number.

It is an amenable number.

77966173741449 is a deficient number, since it is larger than the sum of its proper divisors (44534562594423).

77966173741449 is a wasteful number, since it uses less digits than its factorization.

77966173741449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427506.

The product of its digits is 1344252672, while the sum is 75.

The spelling of 77966173741449 in words is "seventy-seven trillion, nine hundred sixty-six billion, one hundred seventy-three million, seven hundred forty-one thousand, four hundred forty-nine".