15665412210 has 48 divisors (see below), whose sum is σ = 43735277376. Its totient is φ = 3580665312.

The previous prime is 15665412209. The next prime is 15665412233. The reversal of 15665412210 is 1221456651.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5326902 + ... + 5329841.

It is an arithmetic number, because the mean of its divisors is an integer number (911151612).

Almost surely, 2^15665412210 is an apocalyptic number.

15665412210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15665412210 is an abundant number, since it is smaller than the sum of its proper divisors (28069865166).

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

15665412210 is a wasteful number, since it uses less digits than its factorization.

15665412210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10656767 (or 10656760 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

Adding to 15665412210 its reverse (1221456651), we get a palindrome (16886868861).

The spelling of 15665412210 in words is "fifteen billion, six hundred sixty-five million, four hundred twelve thousand, two hundred ten".