1625534788331 has 2 divisors, whose sum is σ = 1625534788332. Its totient is φ = 1625534788330.

The previous prime is 1625534788307. The next prime is 1625534788337. The reversal of 1625534788331 is 1338874355261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1625534788331 - 2²² = 1625530594027 is a prime.

It is a super-2 number, since 2×1625534788331² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1625534788337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812767394165 + 812767394166.

It is an arithmetic number, because the mean of its divisors is an integer number (812767394166).

Almost surely, 2^{1625534788331} is an apocalyptic number.

1625534788331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625534788331 is an equidigital number, since it uses as much as digits as its factorization.

1625534788331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14515200, while the sum is 56.

The spelling of 1625534788331 in words is "one trillion, six hundred twenty-five billion, five hundred thirty-four million, seven hundred eighty-eight thousand, three hundred thirty-one".