1018145801 has 4 divisors (see below), whose sum is σ = 1018231812. Its totient is φ = 1018059792.

The previous prime is 1018145789. The next prime is 1018145809. The reversal of 1018145801 is 1085418101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 745235401 + 272910400 = 27299^2 + 16520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1018145801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1018145809) 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, 21746 + ... + 50091.

It is an arithmetic number, because the mean of its divisors is an integer number (254557953).

Almost surely, 2^1018145801 is an apocalyptic number.

It is an amenable number.

1018145801 is a deficient number, since it is larger than the sum of its proper divisors (86011).

1018145801 is an equidigital number, since it uses as much as digits as its factorization.

1018145801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86010.

The product of its (nonzero) digits is 1280, while the sum is 29.

The square root of 1018145801 is about 31908.3970296222. The cubic root of 1018145801 is about 1006.0123791833.

The spelling of 1018145801 in words is "one billion, eighteen million, one hundred forty-five thousand, eight hundred one".