15559242240 has 160 divisors (see below), whose sum is σ = 51346285056. Its totient is φ = 4015226880.

The previous prime is 15559242227. The next prime is 15559242241. The reversal of 15559242240 is 4224295551.

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-3 number, since 3×15559242240³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (15559242241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205404 + ... + 270756.

Almost surely, 2^15559242240 is an apocalyptic number.

15559242240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15559242240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25673142528).

15559242240 is an abundant number, since it is smaller than the sum of its proper divisors (35787042816).

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

15559242240 is an equidigital number, since it uses as much as digits as its factorization.

15559242240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65410 (or 65394 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 15559242240 in words is "fifteen billion, five hundred fifty-nine million, two hundred forty-two thousand, two hundred forty".