1627650257749 has 2 divisors, whose sum is σ = 1627650257750. Its totient is φ = 1627650257748.

The previous prime is 1627650257731. The next prime is 1627650257791. The reversal of 1627650257749 is 9477520567261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1493144695249 + 134505562500 = 1221943^2 + 366750^2 .

It is a cyclic number.

It is not a de Polignac number, because 1627650257749 - 2¹³ = 1627650249557 is a prime.

It is a super-2 number, since 2×1627650257749² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1627650251749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 813825128874 + 813825128875.

It is an arithmetic number, because the mean of its divisors is an integer number (813825128875).

Almost surely, 2^{1627650257749} is an apocalyptic number.

It is an amenable number.

1627650257749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1627650257749 is an equidigital number, since it uses as much as digits as its factorization.

1627650257749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44452800, while the sum is 61.

The spelling of 1627650257749 in words is "one trillion, six hundred twenty-seven billion, six hundred fifty million, two hundred fifty-seven thousand, seven hundred forty-nine".