77828257886137 has 4 divisors (see below), whose sum is σ = 84903554057616. Its totient is φ = 70752961714660.

The previous prime is 77828257886117. The next prime is 77828257886167. The reversal of 77828257886137 is 73168875282877.

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 a de Polignac number, because none of the positive numbers 2^k-77828257886137 is a prime.

It is a super-2 number, since 2×77828257886137² (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 (77828257886117) 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, 3537648085723 + ... + 3537648085744.

It is an arithmetic number, because the mean of its divisors is an integer number (21225888514404).

Almost surely, 2^{77828257886137} is an apocalyptic number.

It is an amenable number.

77828257886137 is a deficient number, since it is larger than the sum of its proper divisors (7075296171479).

77828257886137 is a wasteful number, since it uses less digits than its factorization.

77828257886137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7075296171478.

The product of its digits is 3540418560, while the sum is 79.

The spelling of 77828257886137 in words is "seventy-seven trillion, eight hundred twenty-eight billion, two hundred fifty-seven million, eight hundred eighty-six thousand, one hundred thirty-seven".