127777790079 has 12 divisors (see below), whose sum is σ = 184588259856. Its totient is φ = 85175805312.

The previous prime is 127777790071. The next prime is 127777790087. The reversal of 127777790079 is 970097777721.

It is an interprime number because it is at equal distance from previous prime (127777790071) and next prime (127777790087).

It is not a de Polignac number, because 127777790079 - 2³ = 127777790071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 127777789998 and 127777790025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127777790071) 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, 695634 + ... + 859919.

It is an arithmetic number, because the mean of its divisors is an integer number (15382354988).

Almost surely, 2^127777790079 is an apocalyptic number.

127777790079 is a deficient number, since it is larger than the sum of its proper divisors (56810469777).

127777790079 is a wasteful number, since it uses less digits than its factorization.

127777790079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564686 (or 1564683 counting only the distinct ones).

The product of its (nonzero) digits is 19059138, while the sum is 63.

The spelling of 127777790079 in words is "one hundred twenty-seven billion, seven hundred seventy-seven million, seven hundred ninety thousand, seventy-nine".