1206706071571 has 48 divisors (see below), whose sum is σ = 1670431958272. Its totient is φ = 847774952640.

The previous prime is 1206706071541. The next prime is 1206706071619. The reversal of 1206706071571 is 1751706076021.

It is not a de Polignac number, because 1206706071571 - 2⁷ = 1206706071443 is a prime.

It is a super-2 number, since 2×1206706071571² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (1206706071541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 800841 + ... + 1747786.

Almost surely, 2^{1206706071571} is an apocalyptic number.

1206706071571 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1206706071571 is a deficient number, since it is larger than the sum of its proper divisors (463725886701).

1206706071571 is a wasteful number, since it uses less digits than its factorization.

1206706071571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548712 (or 2548701 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 43.

The spelling of 1206706071571 in words is "one trillion, two hundred six billion, seven hundred six million, seventy-one thousand, five hundred seventy-one".