71551783377 has 8 divisors (see below), whose sum is σ = 106002642080. Its totient is φ = 47701188900.

The previous prime is 71551783349. The next prime is 71551783379. The reversal of 71551783377 is 77338715517.

71551783377 is a `hidden beast` number, since 7 + 1 + 551 + 7 + 83 + 3 + 7 + 7 = 666.

It is not a de Polignac number, because 71551783377 - 2¹⁰ = 71551782353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71551783379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1325032999 + ... + 1325033052.

It is an arithmetic number, because the mean of its divisors is an integer number (13250330260).

Almost surely, 2^71551783377 is an apocalyptic number.

It is an amenable number.

71551783377 is a deficient number, since it is larger than the sum of its proper divisors (34450858703).

71551783377 is a wasteful number, since it uses less digits than its factorization.

71551783377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650066060 (or 2650066054 counting only the distinct ones).

The product of its digits is 4321800, while the sum is 54.

The spelling of 71551783377 in words is "seventy-one billion, five hundred fifty-one million, seven hundred eighty-three thousand, three hundred seventy-seven".