77740093439 has 4 divisors (see below), whose sum is σ = 77752437480. Its totient is φ = 77727749400.

The previous prime is 77740093391. The next prime is 77740093471. The reversal of 77740093439 is 93439004777.

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

It is a cyclic number.

It is not a de Polignac number, because 77740093439 - 2³² = 73445126143 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 (77740092439) 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, 6162569 + ... + 6175170.

It is an arithmetic number, because the mean of its divisors is an integer number (19438109370).

Almost surely, 2^77740093439 is an apocalyptic number.

77740093439 is a deficient number, since it is larger than the sum of its proper divisors (12344041).

77740093439 is a wasteful number, since it uses less digits than its factorization.

77740093439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12344040.

The product of its (nonzero) digits is 4000752, while the sum is 53.

The spelling of 77740093439 in words is "seventy-seven billion, seven hundred forty million, ninety-three thousand, four hundred thirty-nine".