15355881220 has 24 divisors (see below), whose sum is σ = 32340297024. Its totient is φ = 6124648416.

The previous prime is 15355881209. The next prime is 15355881251. The reversal of 15355881220 is 2218855351.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1099392 + ... + 1113271.

It is an arithmetic number, because the mean of its divisors is an integer number (1347512376).

Almost surely, 2^15355881220 is an apocalyptic number.

15355881220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15355881220 is an abundant number, since it is smaller than the sum of its proper divisors (16984415804).

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

15355881220 is a wasteful number, since it uses less digits than its factorization.

15355881220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213019 (or 2213017 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 40.

The spelling of 15355881220 in words is "fifteen billion, three hundred fifty-five million, eight hundred eighty-one thousand, two hundred twenty".