1625723426417 has 4 divisors (see below), whose sum is σ = 1643989981860. Its totient is φ = 1607456870976.

The previous prime is 1625723426407. The next prime is 1625723426423. The reversal of 1625723426417 is 7146243275261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 160749676096 + 1464973750321 = 400936^2 + 1210361^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625723426417 - 2¹² = 1625723422321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1625723426407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9133277588 + ... + 9133277765.

It is an arithmetic number, because the mean of its divisors is an integer number (410997495465).

Almost surely, 2^{1625723426417} is an apocalyptic number.

It is an amenable number.

1625723426417 is a deficient number, since it is larger than the sum of its proper divisors (18266555443).

1625723426417 is an equidigital number, since it uses as much as digits as its factorization.

1625723426417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18266555442.

The product of its digits is 3386880, while the sum is 50.

The spelling of 1625723426417 in words is "one trillion, six hundred twenty-five billion, seven hundred twenty-three million, four hundred twenty-six thousand, four hundred seventeen".