1636340001 has 4 divisors (see below), whose sum is σ = 2181786672. Its totient is φ = 1090893332.

The previous prime is 1636339961. The next prime is 1636340011. The reversal of 1636340001 is 1000436361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1000436361 = 3 ⋅333478787.

It is a cyclic number.

It is not a de Polignac number, because 1636340001 - 2¹⁷ = 1636208929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1636340011) 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, 272723331 + ... + 272723336.

It is an arithmetic number, because the mean of its divisors is an integer number (545446668).

Almost surely, 2^1636340001 is an apocalyptic number.

It is an amenable number.

1636340001 is a deficient number, since it is larger than the sum of its proper divisors (545446671).

1636340001 is an equidigital number, since it uses as much as digits as its factorization.

1636340001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545446670.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1636340001 is about 40451.6996058262. The cubic root of 1636340001 is about 1178.3957902369.

Adding to 1636340001 its reverse (1000436361), we get a palindrome (2636776362).

The spelling of 1636340001 in words is "one billion, six hundred thirty-six million, three hundred forty thousand, one".