1625140157 has 2 divisors, whose sum is σ = 1625140158. Its totient is φ = 1625140156.

The previous prime is 1625140093. The next prime is 1625140171. The reversal of 1625140157 is 7510415261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1567288921 + 57851236 = 39589^2 + 7606^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625140157 - 2⁶ = 1625140093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625140057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812570078 + 812570079.

It is an arithmetic number, because the mean of its divisors is an integer number (812570079).

Almost surely, 2^1625140157 is an apocalyptic number.

It is an amenable number.

1625140157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625140157 is an equidigital number, since it uses as much as digits as its factorization.

1625140157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 1625140157 is about 40313.0271376388. The cubic root of 1625140157 is about 1175.7011435057.

The spelling of 1625140157 in words is "one billion, six hundred twenty-five million, one hundred forty thousand, one hundred fifty-seven".