77730074305787 has 4 divisors (see below), whose sum is σ = 77730119593416. Its totient is φ = 77730029018160.

The previous prime is 77730074305759. The next prime is 77730074305813. The reversal of 77730074305787 is 78750347003777.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77730074305787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77730074301787) 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, 19963514 + ... + 23537247.

It is an arithmetic number, because the mean of its divisors is an integer number (19432529898354).

Almost surely, 2^{77730074305787} is an apocalyptic number.

77730074305787 is a deficient number, since it is larger than the sum of its proper divisors (45287629).

77730074305787 is a wasteful number, since it uses less digits than its factorization.

77730074305787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45287628.

The product of its (nonzero) digits is 169414560, while the sum is 65.

The spelling of 77730074305787 in words is "seventy-seven trillion, seven hundred thirty billion, seventy-four million, three hundred five thousand, seven hundred eighty-seven".