77686560385337 has 4 divisors (see below), whose sum is σ = 77687802181200. Its totient is φ = 77685318589476.

The previous prime is 77686560385333. The next prime is 77686560385403. The reversal of 77686560385337 is 73358306568677.

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 77686560385337 - 2² = 77686560385333 is a prime.

It is a super-2 number, since 2×77686560385337² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77686560385333) 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, 620804087 + ... + 620929212.

It is an arithmetic number, because the mean of its divisors is an integer number (19421950545300).

Almost surely, 2^{77686560385337} is an apocalyptic number.

It is an amenable number.

77686560385337 is a deficient number, since it is larger than the sum of its proper divisors (1241795863).

77686560385337 is a wasteful number, since it uses less digits than its factorization.

77686560385337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241795862.

The product of its (nonzero) digits is 3200601600, while the sum is 74.

The spelling of 77686560385337 in words is "seventy-seven trillion, six hundred eighty-six billion, five hundred sixty million, three hundred eighty-five thousand, three hundred thirty-seven".