156651601 has 2 divisors, whose sum is σ = 156651602. Its totient is φ = 156651600.

The previous prime is 156651589. The next prime is 156651613. The reversal of 156651601 is 106156651.

It is a balanced prime because it is at equal distance from previous prime (156651589) and next prime (156651613).

It can be written as a sum of positive squares in only one way, i.e., 140659600 + 15992001 = 11860^2 + 3999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156651601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156651641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78325800 + 78325801.

It is an arithmetic number, because the mean of its divisors is an integer number (78325801).

Almost surely, 2^156651601 is an apocalyptic number.

It is an amenable number.

156651601 is a deficient number, since it is larger than the sum of its proper divisors (1).

156651601 is an equidigital number, since it uses as much as digits as its factorization.

156651601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 156651601 is about 12516.0537311087. The cubic root of 156651601 is about 539.0697300566.

The spelling of 156651601 in words is "one hundred fifty-six million, six hundred fifty-one thousand, six hundred one".