128162979825 has 24 divisors (see below), whose sum is σ = 213953383488. Its totient is φ = 67689958080.

The previous prime is 128162979799. The next prime is 128162979853. The reversal of 128162979825 is 528979261821.

It is not a de Polignac number, because 128162979825 - 2¹³ = 128162971633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8287614 + ... + 8303063.

It is an arithmetic number, because the mean of its divisors is an integer number (8914724312).

Almost surely, 2^128162979825 is an apocalyptic number.

128162979825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128162979825 is a deficient number, since it is larger than the sum of its proper divisors (85790403663).

128162979825 is a wasteful number, since it uses less digits than its factorization.

128162979825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16590793 (or 16590788 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 60.

The spelling of 128162979825 in words is "one hundred twenty-eight billion, one hundred sixty-two million, nine hundred seventy-nine thousand, eight hundred twenty-five".