31440704025140 has 48 divisors (see below), whose sum is σ = 69513183875520. Its totient is φ = 11912198296320.

The previous prime is 31440704025113. The next prime is 31440704025161. The reversal of 31440704025140 is 4152040704413.

It is a self number, because there is not a number n which added to its sum of digits gives 31440704025140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5461481 + ... + 9628560.

It is an arithmetic number, because the mean of its divisors is an integer number (1448191330740).

Almost surely, 2^{31440704025140} is an apocalyptic number.

It is an amenable number.

31440704025140 is an abundant number, since it is smaller than the sum of its proper divisors (38072479850380).

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

31440704025140 is a wasteful number, since it uses less digits than its factorization.

31440704025140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15095552 (or 15095550 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 35.

Adding to 31440704025140 its reverse (4152040704413), we get a palindrome (35592744729553).

The spelling of 31440704025140 in words is "thirty-one trillion, four hundred forty billion, seven hundred four million, twenty-five thousand, one hundred forty".