155206520120 has 64 divisors (see below), whose sum is σ = 353463505920. Its totient is φ = 61331831424.

The previous prime is 155206520107. The next prime is 155206520129. The reversal of 155206520120 is 21025602551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155206520129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1017569 + ... + 1160111.

It is an arithmetic number, because the mean of its divisors is an integer number (5522867280).

Almost surely, 2^155206520120 is an apocalyptic number.

155206520120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155206520120 is an abundant number, since it is smaller than the sum of its proper divisors (198256985800).

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

155206520120 is a wasteful number, since it uses less digits than its factorization.

155206520120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142884 (or 142880 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 155206520120 in words is "one hundred fifty-five billion, two hundred six million, five hundred twenty thousand, one hundred twenty".