155778120339 has 16 divisors (see below), whose sum is σ = 211673080320. Its totient is φ = 101884367520.

The previous prime is 155778120317. The next prime is 155778120347. The reversal of 155778120339 is 933021877551.

It is not a de Polignac number, because 155778120339 - 2⁵ = 155778120307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155778120291 and 155778120300.

It is not an unprimeable number, because it can be changed into a prime (155778120439) 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, 2056077 + ... + 2130494.

It is an arithmetic number, because the mean of its divisors is an integer number (13229567520).

Almost surely, 2^155778120339 is an apocalyptic number.

155778120339 is a deficient number, since it is larger than the sum of its proper divisors (55894959981).

155778120339 is a wasteful number, since it uses less digits than its factorization.

155778120339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4186810.

The product of its (nonzero) digits is 1587600, while the sum is 51.

The spelling of 155778120339 in words is "one hundred fifty-five billion, seven hundred seventy-eight million, one hundred twenty thousand, three hundred thirty-nine".