155078703880820 has 24 divisors (see below), whose sum is σ = 325666231871904. Its totient is φ = 62031299890976.

The previous prime is 155078703880819. The next prime is 155078703880831. The reversal of 155078703880820 is 28088307870551.

155078703880820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×155078703880820² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4245194 + ... + 18115713.

It is an arithmetic number, because the mean of its divisors is an integer number (13569426327996).

Almost surely, 2^{155078703880820} is an apocalyptic number.

155078703880820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155078703880820 is an abundant number, since it is smaller than the sum of its proper divisors (170587527991084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155078703880820 is a wasteful number, since it uses less digits than its factorization.

155078703880820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22707679 (or 22707677 counting only the distinct ones).

The product of its (nonzero) digits is 30105600, while the sum is 62.

The spelling of 155078703880820 in words is "one hundred fifty-five trillion, seventy-eight billion, seven hundred three million, eight hundred eighty thousand, eight hundred twenty".