155151649 has 2 divisors, whose sum is σ = 155151650. Its totient is φ = 155151648.

The previous prime is 155151643. The next prime is 155151691. The reversal of 155151649 is 946151551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136072225 + 19079424 = 11665^2 + 4368^2 .

It is a cyclic number.

It is not a de Polignac number, because 155151649 - 2³ = 155151641 is a prime.

It is not a weakly prime, because it can be changed into another prime (155151641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77575824 + 77575825.

It is an arithmetic number, because the mean of its divisors is an integer number (77575825).

Almost surely, 2^155151649 is an apocalyptic number.

It is an amenable number.

155151649 is a deficient number, since it is larger than the sum of its proper divisors (1).

155151649 is an equidigital number, since it uses as much as digits as its factorization.

155151649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 37.

The square root of 155151649 is about 12455.9884794423. The cubic root of 155151649 is about 537.3436634924.

The spelling of 155151649 in words is "one hundred fifty-five million, one hundred fifty-one thousand, six hundred forty-nine".