15981422408 has 32 divisors (see below), whose sum is σ = 34974547200. Its totient is φ = 6703452672.

The previous prime is 15981422371. The next prime is 15981422461. The reversal of 15981422408 is 80422418951.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3033353 + ... + 3038616.

It is an arithmetic number, because the mean of its divisors is an integer number (1092954600).

Almost surely, 2^15981422408 is an apocalyptic number.

It is an amenable number.

15981422408 is an abundant number, since it is smaller than the sum of its proper divisors (18993124792).

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

15981422408 is a wasteful number, since it uses less digits than its factorization.

15981422408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6072029 (or 6072025 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 44.

The spelling of 15981422408 in words is "fifteen billion, nine hundred eighty-one million, four hundred twenty-two thousand, four hundred eight".