155720166510120 has 128 divisors (see below), whose sum is σ = 474825505472640. Its totient is φ = 40844062909440.

The previous prime is 155720166510119. The next prime is 155720166510169. The reversal of 155720166510120 is 21015661027551.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 877044874 + ... + 877222406.

It is an arithmetic number, because the mean of its divisors is an integer number (3709574261505).

Almost surely, 2^{155720166510120} is an apocalyptic number.

155720166510120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155720166510120 is an abundant number, since it is smaller than the sum of its proper divisors (319105338962520).

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

155720166510120 is a wasteful number, since it uses less digits than its factorization.

155720166510120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297435 (or 297431 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 42.

The spelling of 155720166510120 in words is "one hundred fifty-five trillion, seven hundred twenty billion, one hundred sixty-six million, five hundred ten thousand, one hundred twenty".