77439345607 has 16 divisors (see below), whose sum is σ = 85505172480. Its totient is φ = 69677856000.

The previous prime is 77439345583. The next prime is 77439345661. The reversal of 77439345607 is 70654393477.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77439345607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77439345667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 550369 + ... + 676597.

It is an arithmetic number, because the mean of its divisors is an integer number (5344073280).

Almost surely, 2^77439345607 is an apocalyptic number.

77439345607 is a deficient number, since it is larger than the sum of its proper divisors (8065826873).

77439345607 is a wasteful number, since it uses less digits than its factorization.

77439345607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127434.

The product of its (nonzero) digits is 13335840, while the sum is 55.

The spelling of 77439345607 in words is "seventy-seven billion, four hundred thirty-nine million, three hundred forty-five thousand, six hundred seven".