15855353420 has 12 divisors (see below), whose sum is σ = 33296242224. Its totient is φ = 6342141360.

The previous prime is 15855353413. The next prime is 15855353429. The reversal of 15855353420 is 2435355851.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (15855353429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396383816 + ... + 396383855.

It is an arithmetic number, because the mean of its divisors is an integer number (2774686852).

Almost surely, 2^15855353420 is an apocalyptic number.

15855353420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15855353420 is an abundant number, since it is smaller than the sum of its proper divisors (17440888804).

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

15855353420 is a wasteful number, since it uses less digits than its factorization.

15855353420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792767680 (or 792767678 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 15855353420 in words is "fifteen billion, eight hundred fifty-five million, three hundred fifty-three thousand, four hundred twenty".