77973915601 has 4 divisors (see below), whose sum is σ = 78177503232. Its totient is φ = 77770327972.

The previous prime is 77973915587. The next prime is 77973915629. The reversal of 77973915601 is 10651937977.

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 a cyclic number.

It is not a de Polignac number, because 77973915601 - 2²³ = 77965526993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77973915671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101793241 + ... + 101794006.

It is an arithmetic number, because the mean of its divisors is an integer number (19544375808).

Almost surely, 2^77973915601 is an apocalyptic number.

It is an amenable number.

77973915601 is a deficient number, since it is larger than the sum of its proper divisors (203587631).

77973915601 is a wasteful number, since it uses less digits than its factorization.

77973915601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203587630.

The product of its (nonzero) digits is 2500470, while the sum is 55.

The spelling of 77973915601 in words is "seventy-seven billion, nine hundred seventy-three million, nine hundred fifteen thousand, six hundred one".