77040345243 has 4 divisors (see below), whose sum is σ = 102720460328. Its totient is φ = 51360230160.

The previous prime is 77040345227. The next prime is 77040345257. The reversal of 77040345243 is 34254304077.

It is a happy number.

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

It is not a de Polignac number, because 77040345243 - 2⁴ = 77040345227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77040345223) 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, 12840057538 + ... + 12840057543.

It is an arithmetic number, because the mean of its divisors is an integer number (25680115082).

Almost surely, 2^77040345243 is an apocalyptic number.

77040345243 is a deficient number, since it is larger than the sum of its proper divisors (25680115085).

77040345243 is a wasteful number, since it uses less digits than its factorization.

77040345243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25680115084.

The product of its (nonzero) digits is 282240, while the sum is 39.

The spelling of 77040345243 in words is "seventy-seven billion, forty million, three hundred forty-five thousand, two hundred forty-three".