71090677991547 has 64 divisors (see below), whose sum is σ = 107840530022400. Its totient is φ = 46275475802400.

The previous prime is 71090677991519. The next prime is 71090677991573. The reversal of 71090677991547 is 74519977609017.

71090677991547 is a `hidden beast` number, since 7 + 1 + 0 + 9 + 0 + 6 + 7 + 79 + 9 + 1 + 547 = 666.

It is not a de Polignac number, because 71090677991547 - 2¹² = 71090677987451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71090677990547) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71329618 + ... + 72319400.

It is an arithmetic number, because the mean of its divisors is an integer number (1685008281600).

Almost surely, 2^{71090677991547} is an apocalyptic number.

71090677991547 is a deficient number, since it is larger than the sum of its proper divisors (36749852030853).

71090677991547 is a wasteful number, since it uses less digits than its factorization.

71090677991547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990245 (or 990239 counting only the distinct ones).

The product of its (nonzero) digits is 210039480, while the sum is 72.

The spelling of 71090677991547 in words is "seventy-one trillion, ninety billion, six hundred seventy-seven million, nine hundred ninety-one thousand, five hundred forty-seven".