625436043664253 has 2 divisors, whose sum is σ = 625436043664254. Its totient is φ = 625436043664252.

The previous prime is 625436043664241. The next prime is 625436043664307. The reversal of 625436043664253 is 352466340634526.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 482802753309529 + 142633290354724 = 21972773^2 + 11942918^2 .

It is a cyclic number.

It is not a de Polignac number, because 625436043664253 - 2²² = 625436039469949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 625436043664192 and 625436043664201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625436043666253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312718021832126 + 312718021832127.

It is an arithmetic number, because the mean of its divisors is an integer number (312718021832127).

Almost surely, 2^{625436043664253} is an apocalyptic number.

It is an amenable number.

625436043664253 is a deficient number, since it is larger than the sum of its proper divisors (1).

625436043664253 is an equidigital number, since it uses as much as digits as its factorization.

625436043664253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 223948800, while the sum is 59.

The spelling of 625436043664253 in words is "six hundred twenty-five trillion, four hundred thirty-six billion, forty-three million, six hundred sixty-four thousand, two hundred fifty-three".