31440511046645 has 8 divisors (see below), whose sum is σ = 38648823335640. Its totient is φ = 24538935450880.

The previous prime is 31440511046617. The next prime is 31440511046647. The reversal of 31440511046645 is 54664011504413.

It can be written as a sum of positive squares in 4 ways, for example, as 1541071477201 + 29899439569444 = 1241399^2 + 5468038^2 .

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

It is not a de Polignac number, because 31440511046645 - 2⁸ = 31440511046389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31440511046596 and 31440511046605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440511046647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76684173080 + ... + 76684173489.

It is an arithmetic number, because the mean of its divisors is an integer number (4831102916955).

Almost surely, 2^{31440511046645} is an apocalyptic number.

It is an amenable number.

31440511046645 is a deficient number, since it is larger than the sum of its proper divisors (7208312288995).

31440511046645 is a wasteful number, since it uses less digits than its factorization.

31440511046645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153368346615.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 31440511046645 in words is "thirty-one trillion, four hundred forty billion, five hundred eleven million, forty-six thousand, six hundred forty-five".