201231136453466 has 16 divisors (see below), whose sum is σ = 344979831772800. Its totient is φ = 86238873302640.

The previous prime is 201231136453447. The next prime is 201231136453481. The reversal of 201231136453466 is 664354631132102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 201231136453466.

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, 253115630 + ... + 253909401.

It is an arithmetic number, because the mean of its divisors is an integer number (21561239485800).

Almost surely, 2^{201231136453466} is an apocalyptic number.

201231136453466 is a deficient number, since it is larger than the sum of its proper divisors (143748695319334).

201231136453466 is a wasteful number, since it uses less digits than its factorization.

201231136453466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507053389.

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

Adding to 201231136453466 its reverse (664354631132102), we get a palindrome (865585767585568).

The spelling of 201231136453466 in words is "two hundred one trillion, two hundred thirty-one billion, one hundred thirty-six million, four hundred fifty-three thousand, four hundred sixty-six".