77379830819 has 4 divisors (see below), whose sum is σ = 77424125544. Its totient is φ = 77335536096.

The previous prime is 77379830797. The next prime is 77379830831. The reversal of 77379830819 is 91803897377.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77379830819 - 2³⁶ = 8660354083 is a prime.

It is a super-2 number, since 2×77379830819² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77379830519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22144742 + ... + 22148235.

It is an arithmetic number, because the mean of its divisors is an integer number (19356031386).

Almost surely, 2^77379830819 is an apocalyptic number.

77379830819 is a deficient number, since it is larger than the sum of its proper divisors (44294725).

77379830819 is a wasteful number, since it uses less digits than its factorization.

77379830819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44294724.

The product of its (nonzero) digits is 16003008, while the sum is 62.

The spelling of 77379830819 in words is "seventy-seven billion, three hundred seventy-nine million, eight hundred thirty thousand, eight hundred nineteen".