1540163437 has 2 divisors, whose sum is σ = 1540163438. Its totient is φ = 1540163436.

The previous prime is 1540163419. The next prime is 1540163473. The reversal of 1540163437 is 7343610451.

Together with next prime (1540163473) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1538129961 + 2033476 = 39219^2 + 1426^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1540163437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540133437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770081718 + 770081719.

It is an arithmetic number, because the mean of its divisors is an integer number (770081719).

Almost surely, 2^1540163437 is an apocalyptic number.

It is an amenable number.

1540163437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540163437 is an equidigital number, since it uses as much as digits as its factorization.

1540163437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 1540163437 is about 39244.9160656511. The cubic root of 1540163437 is about 1154.8412010336.

Adding to 1540163437 its reverse (7343610451), we get a palindrome (8883773888).

The spelling of 1540163437 in words is "one billion, five hundred forty million, one hundred sixty-three thousand, four hundred thirty-seven".