77072506519 has 2 divisors, whose sum is σ = 77072506520. Its totient is φ = 77072506518.

The previous prime is 77072506517. The next prime is 77072506541. The reversal of 77072506519 is 91560527077.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77072506519 - 2¹ = 77072506517 is a prime.

It is a super-2 number, since 2×77072506519² (a number of 23 digits) contains 22 as substring.

Together with 77072506517, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77072506513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38536253259 + 38536253260.

It is an arithmetic number, because the mean of its divisors is an integer number (38536253260).

Almost surely, 2^77072506519 is an apocalyptic number.

77072506519 is a deficient number, since it is larger than the sum of its proper divisors (1).

77072506519 is an equidigital number, since it uses as much as digits as its factorization.

77072506519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 926100, while the sum is 49.

The spelling of 77072506519 in words is "seventy-seven billion, seventy-two million, five hundred six thousand, five hundred nineteen".