1631717645372 has 24 divisors (see below), whose sum is σ = 2878471067136. Its totient is φ = 809299487808.

The previous prime is 1631717645347. The next prime is 1631717645377. The reversal of 1631717645372 is 2735467171361.

It is a super-3 number, since 3×1631717645372³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631717645377) 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, 2809598 + ... + 3340250.

It is an arithmetic number, because the mean of its divisors is an integer number (119936294464).

Almost surely, 2^{1631717645372} is an apocalyptic number.

It is an amenable number.

1631717645372 is a deficient number, since it is larger than the sum of its proper divisors (1246753421764).

1631717645372 is a wasteful number, since it uses less digits than its factorization.

1631717645372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536837 (or 536835 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 53.

The spelling of 1631717645372 in words is "one trillion, six hundred thirty-one billion, seven hundred seventeen million, six hundred forty-five thousand, three hundred seventy-two".