31603545452161 has 8 divisors (see below), whose sum is σ = 31655568579840. Its totient is φ = 31551524920608.

The previous prime is 31603545452137. The next prime is 31603545452183. The reversal of 31603545452161 is 16125454530613.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31603545452161 - 2⁹ = 31603545451649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31603545458161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24519960 + ... + 25776646.

It is an arithmetic number, because the mean of its divisors is an integer number (3956946072480).

Almost surely, 2^{31603545452161} is an apocalyptic number.

It is an amenable number.

31603545452161 is a deficient number, since it is larger than the sum of its proper divisors (52023127679).

31603545452161 is a wasteful number, since it uses less digits than its factorization.

31603545452161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298063.

The product of its (nonzero) digits is 1296000, while the sum is 46.

Adding to 31603545452161 its reverse (16125454530613), we get a palindrome (47728999982774).

The spelling of 31603545452161 in words is "thirty-one trillion, six hundred three billion, five hundred forty-five million, four hundred fifty-two thousand, one hundred sixty-one".