77077775819 has 8 divisors (see below), whose sum is σ = 85873886208. Its totient is φ = 68579838760.

The previous prime is 77077775807. The next prime is 77077775849. The reversal of 77077775819 is 91857777077.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77077775819 is a prime.

It is a super-2 number, since 2×77077775819² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77077775849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74542787 + ... + 74543820.

It is an arithmetic number, because the mean of its divisors is an integer number (10734235776).

Almost surely, 2^77077775819 is an apocalyptic number.

77077775819 is a deficient number, since it is larger than the sum of its proper divisors (8796110389).

77077775819 is a wasteful number, since it uses less digits than its factorization.

77077775819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149086665.

The product of its (nonzero) digits is 42353640, while the sum is 65.

The spelling of 77077775819 in words is "seventy-seven billion, seventy-seven million, seven hundred seventy-five thousand, eight hundred nineteen".