77304321597 has 4 divisors (see below), whose sum is σ = 103072428800. Its totient is φ = 51536214396.

The previous prime is 77304321551. The next prime is 77304321613. The reversal of 77304321597 is 79512340377.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 77304321597 - 2¹⁶ = 77304256061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77304323597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12884053597 + ... + 12884053602.

It is an arithmetic number, because the mean of its divisors is an integer number (25768107200).

Almost surely, 2^77304321597 is an apocalyptic number.

It is an amenable number.

77304321597 is a deficient number, since it is larger than the sum of its proper divisors (25768107203).

77304321597 is a wasteful number, since it uses less digits than its factorization.

77304321597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25768107202.

The product of its (nonzero) digits is 1111320, while the sum is 48.

The spelling of 77304321597 in words is "seventy-seven billion, three hundred four million, three hundred twenty-one thousand, five hundred ninety-seven".