1925429359561 has 2 divisors, whose sum is σ = 1925429359562. Its totient is φ = 1925429359560.

The previous prime is 1925429359549. The next prime is 1925429359583. The reversal of 1925429359561 is 1659539245291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1924823264400 + 606095161 = 1387380^2 + 24619^2 .

It is a cyclic number.

It is not a de Polignac number, because 1925429359561 - 2⁷ = 1925429359433 is a prime.

It is a super-2 number, since 2×1925429359561² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1925429359561.

It is not a weakly prime, because it can be changed into another prime (1925429359261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962714679780 + 962714679781.

It is an arithmetic number, because the mean of its divisors is an integer number (962714679781).

Almost surely, 2^{1925429359561} is an apocalyptic number.

It is an amenable number.

1925429359561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1925429359561 is an equidigital number, since it uses as much as digits as its factorization.

1925429359561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244000, while the sum is 61.

The spelling of 1925429359561 in words is "one trillion, nine hundred twenty-five billion, four hundred twenty-nine million, three hundred fifty-nine thousand, five hundred sixty-one".