1015256663 has 2 divisors, whose sum is σ = 1015256664. Its totient is φ = 1015256662.

The previous prime is 1015256651. The next prime is 1015256687. The reversal of 1015256663 is 3666525101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1015256663 - 2¹⁶ = 1015191127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1015256633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 507628331 + 507628332.

It is an arithmetic number, because the mean of its divisors is an integer number (507628332).

Almost surely, 2^1015256663 is an apocalyptic number.

1015256663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1015256663 is an equidigital number, since it uses as much as digits as its factorization.

1015256663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1015256663 is about 31863.0924895874. The cubic root of 1015256663 is about 1005.0599084771.

The spelling of 1015256663 in words is "one billion, fifteen million, two hundred fifty-six thousand, six hundred sixty-three".