77795510511 has 4 divisors (see below), whose sum is σ = 103727347352. Its totient is φ = 51863673672.

The previous prime is 77795510509. The next prime is 77795510521. The reversal of 77795510511 is 11501559777.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11501559777 = 3 ⋅3833853259.

It is not a de Polignac number, because 77795510511 - 2¹ = 77795510509 is a prime.

It is a super-2 number, since 2×77795510511² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77795510501) 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, 12965918416 + ... + 12965918421.

It is an arithmetic number, because the mean of its divisors is an integer number (25931836838).

Almost surely, 2^77795510511 is an apocalyptic number.

77795510511 is a deficient number, since it is larger than the sum of its proper divisors (25931836841).

77795510511 is a wasteful number, since it uses less digits than its factorization.

77795510511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25931836840.

The product of its (nonzero) digits is 385875, while the sum is 48.

The spelling of 77795510511 in words is "seventy-seven billion, seven hundred ninety-five million, five hundred ten thousand, five hundred eleven".