31796603540 has 24 divisors (see below), whose sum is σ = 71909242440. Its totient is φ = 11740284288.

The previous prime is 31796603519. The next prime is 31796603543. The reversal of 31796603540 is 4530669713.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3751072516 + 28045531024 = 61246^2 + 167468^2 .

It is a super-2 number, since 2×31796603540² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31796603491 and 31796603500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31796603543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61147055 + ... + 61147574.

It is an arithmetic number, because the mean of its divisors is an integer number (2996218435).

Almost surely, 2^31796603540 is an apocalyptic number.

It is an amenable number.

31796603540 is an abundant number, since it is smaller than the sum of its proper divisors (40112638900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31796603540 is a wasteful number, since it uses less digits than its factorization.

31796603540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122294651 (or 122294649 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 44.

The spelling of 31796603540 in words is "thirty-one billion, seven hundred ninety-six million, six hundred three thousand, five hundred forty".