155455957 has 2 divisors, whose sum is σ = 155455958. Its totient is φ = 155455956.

The previous prime is 155455933. The next prime is 155455987. The reversal of 155455957 is 759554551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100681156 + 54774801 = 10034^2 + 7401^2 .

It is a cyclic number.

It is not a de Polignac number, because 155455957 - 2⁷ = 155455829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155455987) 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, 77727978 + 77727979.

It is an arithmetic number, because the mean of its divisors is an integer number (77727979).

Almost surely, 2^155455957 is an apocalyptic number.

It is an amenable number.

155455957 is a deficient number, since it is larger than the sum of its proper divisors (1).

155455957 is an equidigital number, since it uses as much as digits as its factorization.

155455957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787500, while the sum is 46.

The square root of 155455957 is about 12468.1978248663. The cubic root of 155455957 is about 537.6947419096.

The spelling of 155455957 in words is "one hundred fifty-five million, four hundred fifty-five thousand, nine hundred fifty-seven".