7540645043 has 2 divisors, whose sum is σ = 7540645044. Its totient is φ = 7540645042.

The previous prime is 7540645033. The next prime is 7540645081. The reversal of 7540645043 is 3405460457.

It is a happy number.

It is an a-pointer prime, because the next prime (7540645081) can be obtained adding 7540645043 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7540645043 - 2⁴ = 7540645027 is a prime.

It is a super-2 number, since 2×7540645043² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7540644988 and 7540645006.

It is not a weakly prime, because it can be changed into another prime (7540645033) 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, 3770322521 + 3770322522.

It is an arithmetic number, because the mean of its divisors is an integer number (3770322522).

Almost surely, 2^7540645043 is an apocalyptic number.

7540645043 is a deficient number, since it is larger than the sum of its proper divisors (1).

7540645043 is an equidigital number, since it uses as much as digits as its factorization.

7540645043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 38.

The square root of 7540645043 is about 86836.8875708935. The cubic root of 7540645043 is about 1960.9634513452.

The spelling of 7540645043 in words is "seven billion, five hundred forty million, six hundred forty-five thousand, forty-three".