155253838778 has 16 divisors (see below), whose sum is σ = 238206138504. Its totient is φ = 75868004160.

The previous prime is 155253838739. The next prime is 155253838781. The reversal of 155253838778 is 877838352551.

155253838778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 80449947769 + 74803891009 = 283637^2 + 273503^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 155253838778.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4033625 + ... + 4071932.

Almost surely, 2^155253838778 is an apocalyptic number.

155253838778 is a deficient number, since it is larger than the sum of its proper divisors (82952299726).

155253838778 is a wasteful number, since it uses less digits than its factorization.

155253838778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8105777.

The product of its digits is 56448000, while the sum is 62.

The spelling of 155253838778 in words is "one hundred fifty-five billion, two hundred fifty-three million, eight hundred thirty-eight thousand, seven hundred seventy-eight".