77745997345 has 8 divisors (see below), whose sum is σ = 93297294720. Its totient is φ = 62195399280.

The previous prime is 77745997331. The next prime is 77745997387. The reversal of 77745997345 is 54379954777.

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

It is not a de Polignac number, because 77745997345 - 2⁵ = 77745997313 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112776 + ... + 410134.

It is an arithmetic number, because the mean of its divisors is an integer number (11662161840).

Almost surely, 2^77745997345 is an apocalyptic number.

It is an amenable number.

77745997345 is a deficient number, since it is larger than the sum of its proper divisors (15551297375).

77745997345 is a wasteful number, since it uses less digits than its factorization.

77745997345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349655.

The product of its digits is 233377200, while the sum is 67.

The spelling of 77745997345 in words is "seventy-seven billion, seven hundred forty-five million, nine hundred ninety-seven thousand, three hundred forty-five".