156550649 has 2 divisors, whose sum is σ = 156550650. Its totient is φ = 156550648.

The previous prime is 156550621. The next prime is 156550657. The reversal of 156550649 is 946055651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80425024 + 76125625 = 8968^2 + 8725^2 .

It is an emirp because it is prime and its reverse (946055651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 156550649 - 2²⁰ = 155502073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156550679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78275324 + 78275325.

It is an arithmetic number, because the mean of its divisors is an integer number (78275325).

Almost surely, 2^156550649 is an apocalyptic number.

It is an amenable number.

156550649 is a deficient number, since it is larger than the sum of its proper divisors (1).

156550649 is an equidigital number, since it uses as much as digits as its factorization.

156550649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 156550649 is about 12512.0201806103. The cubic root of 156550649 is about 538.9539064469.

The spelling of 156550649 in words is "one hundred fifty-six million, five hundred fifty thousand, six hundred forty-nine".