77945687734 has 8 divisors (see below), whose sum is σ = 117317571840. Its totient is φ = 38839830456.

The previous prime is 77945687707. The next prime is 77945687753. The reversal of 77945687734 is 43778654977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 77945687734.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66505974 + ... + 66507145.

It is an arithmetic number, because the mean of its divisors is an integer number (14664696480).

Almost surely, 2^77945687734 is an apocalyptic number.

77945687734 is a deficient number, since it is larger than the sum of its proper divisors (39371884106).

77945687734 is a wasteful number, since it uses less digits than its factorization.

77945687734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133013414.

The product of its digits is 248935680, while the sum is 67.

The spelling of 77945687734 in words is "seventy-seven billion, nine hundred forty-five million, six hundred eighty-seven thousand, seven hundred thirty-four".