15634243240 has 64 divisors (see below), whose sum is σ = 43857106560. Its totient is φ = 4873009920.

The previous prime is 15634243211. The next prime is 15634243259. The reversal of 15634243240 is 4234243651.

It is a junction number, because it is equal to n+sod(n) for n = 15634243196 and 15634243205.

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, 2534947 + ... + 2541106.

It is an arithmetic number, because the mean of its divisors is an integer number (685267290).

Almost surely, 2^15634243240 is an apocalyptic number.

15634243240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15634243240 is an abundant number, since it is smaller than the sum of its proper divisors (28222863320).

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

15634243240 is a wasteful number, since it uses less digits than its factorization.

15634243240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5076082 (or 5076078 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 15634243240 its reverse (4234243651), we get a palindrome (19868486891).

The spelling of 15634243240 in words is "fifteen billion, six hundred thirty-four million, two hundred forty-three thousand, two hundred forty".