1544340157 has 2 divisors, whose sum is σ = 1544340158. Its totient is φ = 1544340156.

The previous prime is 1544340143. The next prime is 1544340167. The reversal of 1544340157 is 7510434451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1414812996 + 129527161 = 37614^2 + 11381^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1544340157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1544340107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772170078 + 772170079.

It is an arithmetic number, because the mean of its divisors is an integer number (772170079).

Almost surely, 2^1544340157 is an apocalyptic number.

It is an amenable number.

1544340157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1544340157 is an equidigital number, since it uses as much as digits as its factorization.

1544340157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 1544340157 is about 39298.0935542680. The cubic root of 1544340157 is about 1155.8841844378.

The spelling of 1544340157 in words is "one billion, five hundred forty-four million, three hundred forty thousand, one hundred fifty-seven".