1015564055263 has 4 divisors (see below), whose sum is σ = 1015601232400. Its totient is φ = 1015526878128.

The previous prime is 1015564055257. The next prime is 1015564055381. The reversal of 1015564055263 is 3625504655101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1015564055263 - 2¹⁷ = 1015563924191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1015564055243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18547563 + ... + 18602236.

It is an arithmetic number, because the mean of its divisors is an integer number (253900308100).

Almost surely, 2^{1015564055263} is an apocalyptic number.

1015564055263 is a deficient number, since it is larger than the sum of its proper divisors (37177137).

1015564055263 is an equidigital number, since it uses as much as digits as its factorization.

1015564055263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37177136.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 1015564055263 in words is "one trillion, fifteen billion, five hundred sixty-four million, fifty-five thousand, two hundred sixty-three".