3126616346561 has 4 divisors (see below), whose sum is σ = 3126647042772. Its totient is φ = 3126585650352.

The previous prime is 3126616346507. The next prime is 3126616346593. The reversal of 3126616346561 is 1656436166213.

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 1992911007025 + 1133705339536 = 1411705^2 + 1064756^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3126616346561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3126616316561) 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, 15194810 + ... + 15399203.

It is an arithmetic number, because the mean of its divisors is an integer number (781661760693).

Almost surely, 2^{3126616346561} is an apocalyptic number.

It is an amenable number.

3126616346561 is a deficient number, since it is larger than the sum of its proper divisors (30696211).

3126616346561 is a wasteful number, since it uses less digits than its factorization.

3126616346561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30696210.

The product of its digits is 2799360, while the sum is 50.

The spelling of 3126616346561 in words is "three trillion, one hundred twenty-six billion, six hundred sixteen million, three hundred forty-six thousand, five hundred sixty-one".