155705527220 has 48 divisors (see below), whose sum is σ = 346457502720. Its totient is φ = 58577631744.

The previous prime is 155705527217. The next prime is 155705527249. The reversal of 155705527220 is 22725507551.

It is a super-2 number, since 2×155705527220² (a number of 23 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 15 ways as a sum of consecutive naturals, for example, 330137 + ... + 648383.

It is an arithmetic number, because the mean of its divisors is an integer number (7217864640).

Almost surely, 2^155705527220 is an apocalyptic number.

155705527220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155705527220 is an abundant number, since it is smaller than the sum of its proper divisors (190751975500).

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

155705527220 is a wasteful number, since it uses less digits than its factorization.

155705527220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319712 (or 319710 counting only the distinct ones).

The product of its (nonzero) digits is 245000, while the sum is 41.

The spelling of 155705527220 in words is "one hundred fifty-five billion, seven hundred five million, five hundred twenty-seven thousand, two hundred twenty".