77609387434 has 8 divisors (see below), whose sum is σ = 116475714180. Its totient is φ = 38784149376.

The previous prime is 77609387431. The next prime is 77609387503. The reversal of 77609387434 is 43478390677.

It can be written as a sum of positive squares in 2 ways, for example, as 71848122025 + 5761265409 = 268045^2 + 75903^2 .

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

It is not an unprimeable number, because it can be changed into a prime (77609387431) 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, 10267449 + ... + 10275004.

Almost surely, 2^77609387434 is an apocalyptic number.

77609387434 is a deficient number, since it is larger than the sum of its proper divisors (38866326746).

77609387434 is a wasteful number, since it uses less digits than its factorization.

77609387434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20544344.

The product of its (nonzero) digits is 21337344, while the sum is 58.

The spelling of 77609387434 in words is "seventy-seven billion, six hundred nine million, three hundred eighty-seven thousand, four hundred thirty-four".