1015312171128 has 64 divisors (see below), whose sum is σ = 2555274276000. Its totient is φ = 336172941312.

The previous prime is 1015312171127. The next prime is 1015312171141. The reversal of 1015312171128 is 8211712135101.

It is a Cunningham number, because it is equal to 1007627²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1015312171127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12049528 + ... + 12133496.

Almost surely, 2^{1015312171128} is an apocalyptic number.

It is an amenable number.

1015312171128 is an abundant number, since it is smaller than the sum of its proper divisors (1539962104872).

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

1015312171128 is a wasteful number, since it uses less digits than its factorization.

1015312171128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87344 (or 87340 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 33.

The spelling of 1015312171128 in words is "one trillion, fifteen billion, three hundred twelve million, one hundred seventy-one thousand, one hundred twenty-eight".