1018152557321 has 4 divisors (see below), whose sum is σ = 1023320844612. Its totient is φ = 1012984270032.

The previous prime is 1018152557287. The next prime is 1018152557369. The reversal of 1018152557321 is 1237552518101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 795599777296 + 222552780025 = 891964^2 + 471755^2 .

It is a cyclic number.

It is not a de Polignac number, because 1018152557321 - 2²² = 1018148363017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1018152557371) 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, 2584143350 + ... + 2584143743.

It is an arithmetic number, because the mean of its divisors is an integer number (255830211153).

Almost surely, 2^{1018152557321} is an apocalyptic number.

It is an amenable number.

1018152557321 is a deficient number, since it is larger than the sum of its proper divisors (5168287291).

1018152557321 is an equidigital number, since it uses as much as digits as its factorization.

1018152557321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168287290.

The product of its (nonzero) digits is 84000, while the sum is 41.

The spelling of 1018152557321 in words is "one trillion, eighteen billion, one hundred fifty-two million, five hundred fifty-seven thousand, three hundred twenty-one".