71055261387 has 24 divisors (see below), whose sum is σ = 112652799168. Its totient is φ = 42799590000.

The previous prime is 71055261373. The next prime is 71055261449. The reversal of 71055261387 is 78316255017.

It is a happy number.

71055261387 is a `hidden beast` number, since 7 + 1 + 0 + 5 + 5 + 261 + 387 = 666.

It is not a de Polignac number, because 71055261387 - 2⁴ = 71055261371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71055361387) 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 23 ways as a sum of consecutive naturals, for example, 2185489 + ... + 2217762.

It is an arithmetic number, because the mean of its divisors is an integer number (4693866632).

Almost surely, 2^71055261387 is an apocalyptic number.

71055261387 is a deficient number, since it is larger than the sum of its proper divisors (41597537781).

71055261387 is a wasteful number, since it uses less digits than its factorization.

71055261387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4403431 (or 4403428 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The spelling of 71055261387 in words is "seventy-one billion, fifty-five million, two hundred sixty-one thousand, three hundred eighty-seven".