3161071736021 has 4 divisors (see below), whose sum is σ = 3164085151500. Its totient is φ = 3158058320544.

The previous prime is 3161071735973. The next prime is 3161071736057. The reversal of 3161071736021 is 1206371701613.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2454984451921 + 706087284100 = 1566839^2 + 840290^2 .

It is a cyclic number.

It is not a de Polignac number, because 3161071736021 - 2²² = 3161067541717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3161071736321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1506706166 + ... + 1506708263.

It is an arithmetic number, because the mean of its divisors is an integer number (791021287875).

Almost surely, 2^{3161071736021} is an apocalyptic number.

It is an amenable number.

3161071736021 is a deficient number, since it is larger than the sum of its proper divisors (3013415479).

3161071736021 is a wasteful number, since it uses less digits than its factorization.

3161071736021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013415478.

The product of its (nonzero) digits is 31752, while the sum is 38.

The spelling of 3161071736021 in words is "three trillion, one hundred sixty-one billion, seventy-one million, seven hundred thirty-six thousand, twenty-one".