155755799 has 2 divisors, whose sum is σ = 155755800. Its totient is φ = 155755798.

The previous prime is 155755783. The next prime is 155755801. The reversal of 155755799 is 997557551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155755799 - 2⁴ = 155755783 is a prime.

Together with 155755801, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155755799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155755709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77877899 + 77877900.

It is an arithmetic number, because the mean of its divisors is an integer number (77877900).

Almost surely, 2^155755799 is an apocalyptic number.

155755799 is a deficient number, since it is larger than the sum of its proper divisors (1).

155755799 is an equidigital number, since it uses as much as digits as its factorization.

155755799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2480625, while the sum is 53.

The square root of 155755799 is about 12480.2163042152. The cubic root of 155755799 is about 538.0402200875.

The spelling of 155755799 in words is "one hundred fifty-five million, seven hundred fifty-five thousand, seven hundred ninety-nine".