77850406278609 has 16 divisors (see below), whose sum is σ = 111241003569792. Its totient is φ = 48302014704768.

The previous prime is 77850406278569. The next prime is 77850406278611. The reversal of 77850406278609 is 90687260405877.

It is not a de Polignac number, because 77850406278609 - 2⁷ = 77850406278481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is not an unprimeable number, because it can be changed into a prime (77850406278629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15246845524 + ... + 15246850629.

It is an arithmetic number, because the mean of its divisors is an integer number (6952562723112).

Almost surely, 2^{77850406278609} is an apocalyptic number.

It is an amenable number.

77850406278609 is a deficient number, since it is larger than the sum of its proper divisors (33390597291183).

77850406278609 is a wasteful number, since it uses less digits than its factorization.

77850406278609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30493696216.

The product of its (nonzero) digits is 284497920, while the sum is 69.

The spelling of 77850406278609 in words is "seventy-seven trillion, eight hundred fifty billion, four hundred six million, two hundred seventy-eight thousand, six hundred nine".