10128156225 has 24 divisors (see below), whose sum is σ = 18267512352. Its totient is φ = 4910620800.

The previous prime is 10128156223. The next prime is 10128156251. The reversal of 10128156225 is 52265182101.

It is not a de Polignac number, because 10128156225 - 2¹ = 10128156223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (10128156223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6137452 + ... + 6139101.

It is an arithmetic number, because the mean of its divisors is an integer number (761146348).

Almost surely, 2^10128156225 is an apocalyptic number.

10128156225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10128156225 is a deficient number, since it is larger than the sum of its proper divisors (8139356127).

10128156225 is a wasteful number, since it uses less digits than its factorization.

10128156225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12276577 (or 12276572 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 33.

The spelling of 10128156225 in words is "ten billion, one hundred twenty-eight million, one hundred fifty-six thousand, two hundred twenty-five".