742809555 has 16 divisors (see below), whose sum is σ = 1320550560. Its totient is φ = 396165024.

The previous prime is 742809539. The next prime is 742809559. The reversal of 742809555 is 555908247.

742809555 is a `hidden beast` number, since 74 + 28 + 0 + 9 + 555 = 666.

742809555 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 742809555 - 2⁴ = 742809539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 742809555.

It is not an unprimeable number, because it can be changed into a prime (742809559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2751012 + ... + 2751281.

It is an arithmetic number, because the mean of its divisors is an integer number (82534410).

Almost surely, 2^742809555 is an apocalyptic number.

742809555 is a deficient number, since it is larger than the sum of its proper divisors (577741005).

742809555 is a wasteful number, since it uses less digits than its factorization.

742809555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5502307 (or 5502301 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The square root of 742809555 is about 27254.5327422798. The cubic root of 742809555 is about 905.6474330996.

The spelling of 742809555 in words is "seven hundred forty-two million, eight hundred nine thousand, five hundred fifty-five".