1251316641625 has 32 divisors (see below), whose sum is σ = 1637813219328. Its totient is φ = 952668270400.

The previous prime is 1251316641613. The next prime is 1251316641629. The reversal of 1251316641625 is 5261466131521.

It is not a de Polignac number, because 1251316641625 - 2⁵ = 1251316641593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251316641629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 538297 + ... + 1671046.

It is an arithmetic number, because the mean of its divisors is an integer number (51181663104).

Almost surely, 2^{1251316641625} is an apocalyptic number.

It is an amenable number.

1251316641625 is a deficient number, since it is larger than the sum of its proper divisors (386496577703).

1251316641625 is a wasteful number, since it uses less digits than its factorization.

1251316641625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209578 (or 2209568 counting only the distinct ones).

The product of its digits is 259200, while the sum is 43.

The spelling of 1251316641625 in words is "one trillion, two hundred fifty-one billion, three hundred sixteen million, six hundred forty-one thousand, six hundred twenty-five".