77642159019 has 12 divisors (see below), whose sum is σ = 105247811448. Its totient is φ = 50912883840.

The previous prime is 77642159003. The next prime is 77642159051. The reversal of 77642159019 is 91095124677.

It is not a de Polignac number, because 77642159019 - 2⁴ = 77642159003 is a prime.

It is a super-2 number, since 2×77642159019² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77642359019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3466494 + ... + 3488819.

It is an arithmetic number, because the mean of its divisors is an integer number (8770650954).

Almost surely, 2^77642159019 is an apocalyptic number.

77642159019 is a deficient number, since it is larger than the sum of its proper divisors (27605652429).

77642159019 is an equidigital number, since it uses as much as digits as its factorization.

77642159019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6955438 (or 6955377 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 51.

The spelling of 77642159019 in words is "seventy-seven billion, six hundred forty-two million, one hundred fifty-nine thousand, nineteen".