77772271155 has 8 divisors (see below), whose sum is σ = 124435633872. Its totient is φ = 41478544608.

The previous prime is 77772271147. The next prime is 77772271163. The reversal of 77772271155 is 55117227777.

It is an interprime number because it is at equal distance from previous prime (77772271147) and next prime (77772271163).

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

It is not a de Polignac number, because 77772271155 - 2³ = 77772271147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77772271098 and 77772271107.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2592409024 + ... + 2592409053.

It is an arithmetic number, because the mean of its divisors is an integer number (15554454234).

Almost surely, 2^77772271155 is an apocalyptic number.

77772271155 is a deficient number, since it is larger than the sum of its proper divisors (46663362717).

77772271155 is a wasteful number, since it uses less digits than its factorization.

77772271155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5184818085.

The product of its digits is 1680700, while the sum is 51.

The spelling of 77772271155 in words is "seventy-seven billion, seven hundred seventy-two million, two hundred seventy-one thousand, one hundred fifty-five".