1656155201 has 2 divisors, whose sum is σ = 1656155202. Its totient is φ = 1656155200.

The previous prime is 1656155177. The next prime is 1656155203. The reversal of 1656155201 is 1025516561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1615959601 + 40195600 = 40199^2 + 6340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1656155201 - 2¹⁴ = 1656138817 is a prime.

It is a Sophie Germain prime.

Together with 1656155203, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1656155203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828077600 + 828077601.

It is an arithmetic number, because the mean of its divisors is an integer number (828077601).

Almost surely, 2^1656155201 is an apocalyptic number.

It is an amenable number.

1656155201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656155201 is an equidigital number, since it uses as much as digits as its factorization.

1656155201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 1656155201 is about 40695.8867823273. The cubic root of 1656155201 is about 1183.1332988772.

The spelling of 1656155201 in words is "one billion, six hundred fifty-six million, one hundred fifty-five thousand, two hundred one".