19777311879 has 16 divisors (see below), whose sum is σ = 30068674272. Its totient is φ = 11454732288.

The previous prime is 19777311863. The next prime is 19777311881. The reversal of 19777311879 is 97811377791.

It is not a de Polignac number, because 19777311879 - 2⁴ = 19777311863 is a prime.

It is a super-2 number, since 2×19777311879² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19777311179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14914354 + ... + 14915679.

It is an arithmetic number, because the mean of its divisors is an integer number (1879292142).

Almost surely, 2^19777311879 is an apocalyptic number.

19777311879 is a deficient number, since it is larger than the sum of its proper divisors (10291362393).

19777311879 is a wasteful number, since it uses less digits than its factorization.

19777311879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29830066.

The product of its digits is 4667544, while the sum is 60.

The spelling of 19777311879 in words is "nineteen billion, seven hundred seventy-seven million, three hundred eleven thousand, eight hundred seventy-nine".