77137081247 has 2 divisors, whose sum is σ = 77137081248. Its totient is φ = 77137081246.

The previous prime is 77137081183. The next prime is 77137081249. The reversal of 77137081247 is 74218073177.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77137081247 - 2⁶ = 77137081183 is a prime.

Together with 77137081249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77137081249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38568540623 + 38568540624.

It is an arithmetic number, because the mean of its divisors is an integer number (38568540624).

Almost surely, 2^77137081247 is an apocalyptic number.

77137081247 is a deficient number, since it is larger than the sum of its proper divisors (1).

77137081247 is an equidigital number, since it uses as much as digits as its factorization.

77137081247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 460992, while the sum is 47.

The spelling of 77137081247 in words is "seventy-seven billion, one hundred thirty-seven million, eighty-one thousand, two hundred forty-seven".