1540526641 has 2 divisors, whose sum is σ = 1540526642. Its totient is φ = 1540526640.

The previous prime is 1540526599. The next prime is 1540526671. The reversal of 1540526641 is 1466250451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1251390625 + 289136016 = 35375^2 + 17004^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540526641 - 2²⁵ = 1506972209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1540526597 and 1540526606.

It is not a weakly prime, because it can be changed into another prime (1540526671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770263320 + 770263321.

It is an arithmetic number, because the mean of its divisors is an integer number (770263321).

Almost surely, 2^1540526641 is an apocalyptic number.

It is an amenable number.

1540526641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540526641 is an equidigital number, since it uses as much as digits as its factorization.

1540526641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 1540526641 is about 39249.5431947940. The cubic root of 1540526641 is about 1154.9319727805.

The spelling of 1540526641 in words is "one billion, five hundred forty million, five hundred twenty-six thousand, six hundred forty-one".