2972686581806 has 4 divisors (see below), whose sum is σ = 4459029872712. Its totient is φ = 1486343290902.

The previous prime is 2972686581803. The next prime is 2972686581871. The reversal of 2972686581806 is 6081856862792.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2972686581803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743171645450 + ... + 743171645453.

It is an arithmetic number, because the mean of its divisors is an integer number (1114757468178).

Almost surely, 2^{2972686581806} is an apocalyptic number.

2972686581806 is a deficient number, since it is larger than the sum of its proper divisors (1486343290906).

2972686581806 is a wasteful number, since it uses less digits than its factorization.

2972686581806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486343290905.

The product of its (nonzero) digits is 139345920, while the sum is 68.

The spelling of 2972686581806 in words is "two trillion, nine hundred seventy-two billion, six hundred eighty-six million, five hundred eighty-one thousand, eight hundred six".