31645225981436 has 6 divisors (see below), whose sum is σ = 55379145467520. Its totient is φ = 15822612990716.

The previous prime is 31645225981429. The next prime is 31645225981459. The reversal of 31645225981436 is 63418952254613.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3955653247676 + ... + 3955653247683.

It is an arithmetic number, because the mean of its divisors is an integer number (9229857577920).

Almost surely, 2^{31645225981436} is an apocalyptic number.

It is an amenable number.

31645225981436 is a deficient number, since it is larger than the sum of its proper divisors (23733919486084).

31645225981436 is a wasteful number, since it uses less digits than its factorization.

31645225981436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7911306495363 (or 7911306495361 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 59.

The spelling of 31645225981436 in words is "thirty-one trillion, six hundred forty-five billion, two hundred twenty-five million, nine hundred eighty-one thousand, four hundred thirty-six".