157641681220 has 24 divisors (see below), whose sum is σ = 345440902464. Its totient is φ = 60315077856.

The previous prime is 157641681217. The next prime is 157641681227. The reversal of 157641681220 is 22186146751.

It is not an unprimeable number, because it can be changed into a prime (157641681227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171349194 + ... + 171350113.

It is an arithmetic number, because the mean of its divisors is an integer number (14393370936).

Almost surely, 2^157641681220 is an apocalyptic number.

157641681220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157641681220 is an abundant number, since it is smaller than the sum of its proper divisors (187799221244).

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

157641681220 is a wasteful number, since it uses less digits than its factorization.

157641681220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342699339 (or 342699337 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 157641681220 in words is "one hundred fifty-seven billion, six hundred forty-one million, six hundred eighty-one thousand, two hundred twenty".