201231136453646 has 16 divisors (see below), whose sum is σ = 325066000459200. Its totient is φ = 92875818133728.

The previous prime is 201231136453621. The next prime is 201231136453663. The reversal of 201231136453646 is 646354631132102.

It is a happy number.

201231136453646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 201231136453646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28417520 + ... + 34785308.

It is an arithmetic number, because the mean of its divisors is an integer number (20316625028700).

Almost surely, 2^{201231136453646} is an apocalyptic number.

201231136453646 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

201231136453646 is a deficient number, since it is larger than the sum of its proper divisors (123834864005554).

201231136453646 is a wasteful number, since it uses less digits than its factorization.

201231136453646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7583243.

The product of its (nonzero) digits is 1866240, while the sum is 47.

Adding to 201231136453646 its reverse (646354631132102), we get a palindrome (847585767585748).

The spelling of 201231136453646 in words is "two hundred one trillion, two hundred thirty-one billion, one hundred thirty-six million, four hundred fifty-three thousand, six hundred forty-six".