1025515663 has 2 divisors, whose sum is σ = 1025515664. Its totient is φ = 1025515662.

The previous prime is 1025515649. The next prime is 1025515703. The reversal of 1025515663 is 3665155201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1025515663 - 2⁹ = 1025515151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025515613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512757831 + 512757832.

It is an arithmetic number, because the mean of its divisors is an integer number (512757832).

Almost surely, 2^1025515663 is an apocalyptic number.

1025515663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025515663 is an equidigital number, since it uses as much as digits as its factorization.

1025515663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 1025515663 is about 32023.6734776009. The cubic root of 1025515663 is about 1008.4338905217.

The spelling of 1025515663 in words is "one billion, twenty-five million, five hundred fifteen thousand, six hundred sixty-three".