1636031439953 has 4 divisors (see below), whose sum is σ = 1636152919860. Its totient is φ = 1635909960048.

The previous prime is 1636031439941. The next prime is 1636031439961. The reversal of 1636031439953 is 3599341306361.

It is a happy number.

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 664758116929 + 971273323024 = 815327^2 + 985532^2 .

It is a cyclic number.

It is not a de Polignac number, because 1636031439953 - 2¹⁴ = 1636031423569 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1636031439895 and 1636031439904.

It is not an unprimeable number, because it can be changed into a prime (1636031432953) 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, 60719750 + ... + 60746687.

It is an arithmetic number, because the mean of its divisors is an integer number (409038229965).

Almost surely, 2^{1636031439953} is an apocalyptic number.

It is an amenable number.

1636031439953 is a deficient number, since it is larger than the sum of its proper divisors (121479907).

1636031439953 is a wasteful number, since it uses less digits than its factorization.

1636031439953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121479906.

The product of its (nonzero) digits is 4723920, while the sum is 53.

The spelling of 1636031439953 in words is "one trillion, six hundred thirty-six billion, thirty-one million, four hundred thirty-nine thousand, nine hundred fifty-three".