71986946475407 has 4 divisors (see below), whose sum is σ = 73742725657776. Its totient is φ = 70231167293040.

The previous prime is 71986946475401. The next prime is 71986946475439. The reversal of 71986946475407 is 70457464968917.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71986946475407 - 2⁴ = 71986946475391 is a prime.

It is a super-2 number, since 2×71986946475407² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71986946475401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 877889591123 + ... + 877889591204.

It is an arithmetic number, because the mean of its divisors is an integer number (18435681414444).

Almost surely, 2^{71986946475407} is an apocalyptic number.

71986946475407 is a deficient number, since it is larger than the sum of its proper divisors (1755779182369).

71986946475407 is a wasteful number, since it uses less digits than its factorization.

71986946475407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755779182368.

The product of its (nonzero) digits is 2560481280, while the sum is 77.

The spelling of 71986946475407 in words is "seventy-one trillion, nine hundred eighty-six billion, nine hundred forty-six million, four hundred seventy-five thousand, four hundred seven".