1025642721170 has 128 divisors (see below), whose sum is σ = 2019088650240. Its totient is φ = 373949706240.

The previous prime is 1025642721163. The next prime is 1025642721199. The reversal of 1025642721170 is 711272465201.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 431485022 + ... + 431487398.

It is an arithmetic number, because the mean of its divisors is an integer number (15774130080).

Almost surely, 2^{1025642721170} is an apocalyptic number.

1025642721170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1025642721170 is a deficient number, since it is larger than the sum of its proper divisors (993445929070).

1025642721170 is a wasteful number, since it uses less digits than its factorization.

1025642721170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340.

The product of its (nonzero) digits is 47040, while the sum is 38.

The spelling of 1025642721170 in words is "one trillion, twenty-five billion, six hundred forty-two million, seven hundred twenty-one thousand, one hundred seventy".