15128491870 has 16 divisors (see below), whose sum is σ = 27232706160. Its totient is φ = 6051081024.

The previous prime is 15128491789. The next prime is 15128491871. The reversal of 15128491870 is 7819482151.

It is a self number, because there is not a number n which added to its sum of digits gives 15128491870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15128491871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304714 + ... + 350866.

It is an arithmetic number, because the mean of its divisors is an integer number (1702044135).

Almost surely, 2^15128491870 is an apocalyptic number.

15128491870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15128491870 is a deficient number, since it is larger than the sum of its proper divisors (12104214290).

15128491870 is a wasteful number, since it uses less digits than its factorization.

15128491870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78939.

The product of its (nonzero) digits is 161280, while the sum is 46.

The spelling of 15128491870 in words is "fifteen billion, one hundred twenty-eight million, four hundred ninety-one thousand, eight hundred seventy".