77569140393 has 12 divisors (see below), whose sum is σ = 112480287348. Its totient is φ = 51511541760.

The previous prime is 77569140349. The next prime is 77569140401. The reversal of 77569140393 is 39304196577.

It is a happy number.

77569140393 is a `hidden beast` number, since 7 + 7 + 569 + 1 + 40 + 39 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 65540096064 + 12029044329 = 256008^2 + 109677^2 .

It is not a de Polignac number, because 77569140393 - 2⁶ = 77569140329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77569140343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16765768 + ... + 16770393.

It is an arithmetic number, because the mean of its divisors is an integer number (9373357279).

Almost surely, 2^77569140393 is an apocalyptic number.

It is an amenable number.

77569140393 is a deficient number, since it is larger than the sum of its proper divisors (34911146955).

77569140393 is a wasteful number, since it uses less digits than its factorization.

77569140393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33536424 (or 33536421 counting only the distinct ones).

The product of its (nonzero) digits is 4286520, while the sum is 54.

The spelling of 77569140393 in words is "seventy-seven billion, five hundred sixty-nine million, one hundred forty thousand, three hundred ninety-three".