15509771073420 has 48 divisors (see below), whose sum is σ = 46767925085280. Its totient is φ = 3817789802496.

The previous prime is 15509771073403. The next prime is 15509771073431. The reversal of 15509771073420 is 2437017790551.

15509771073420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 9942160165 + ... + 9942161724.

It is an arithmetic number, because the mean of its divisors is an integer number (974331772610).

Almost surely, 2^{15509771073420} is an apocalyptic number.

15509771073420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15509771073420 is an abundant number, since it is smaller than the sum of its proper divisors (31258154011860).

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

15509771073420 is a wasteful number, since it uses less digits than its factorization.

15509771073420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19884321914 (or 19884321912 counting only the distinct ones).

The product of its (nonzero) digits is 1852200, while the sum is 51.

The spelling of 15509771073420 in words is "fifteen trillion, five hundred nine billion, seven hundred seventy-one million, seventy-three thousand, four hundred twenty".