1012506785128 has 64 divisors (see below), whose sum is σ = 1993113682560. Its totient is φ = 481288237056.

The previous prime is 1012506785119. The next prime is 1012506785131. The reversal of 1012506785128 is 8215876052101.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19914876 + ... + 19965652.

It is an arithmetic number, because the mean of its divisors is an integer number (31142401290).

Almost surely, 2^{1012506785128} is an apocalyptic number.

It is an amenable number.

1012506785128 is a deficient number, since it is larger than the sum of its proper divisors (980606897432).

1012506785128 is a wasteful number, since it uses less digits than its factorization.

1012506785128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51466 (or 51462 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 46.

The spelling of 1012506785128 in words is "one trillion, twelve billion, five hundred six million, seven hundred eighty-five thousand, one hundred twenty-eight".