3167656561 has 2 divisors, whose sum is σ = 3167656562. Its totient is φ = 3167656560.

The previous prime is 3167656559. The next prime is 3167656627. The reversal of 3167656561 is 1656567613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2554797025 + 612859536 = 50545^2 + 24756^2 .

It is a cyclic number.

It is not a de Polignac number, because 3167656561 - 2¹ = 3167656559 is a prime.

Together with 3167656559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3167656511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1583828280 + 1583828281.

It is an arithmetic number, because the mean of its divisors is an integer number (1583828281).

Almost surely, 2^3167656561 is an apocalyptic number.

It is an amenable number.

3167656561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3167656561 is an equidigital number, since it uses as much as digits as its factorization.

3167656561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 46.

The square root of 3167656561 is about 56281.9381418231. The cubic root of 3167656561 is about 1468.6310177441.

The spelling of 3167656561 in words is "three billion, one hundred sixty-seven million, six hundred fifty-six thousand, five hundred sixty-one".