31475203007440 has 80 divisors (see below), whose sum is σ = 76376537088768. Its totient is φ = 12040327461888.

The previous prime is 31475203007333. The next prime is 31475203007453. The reversal of 31475203007440 is 4470030257413.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 31475203007393 and 31475203007402.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7735117 + ... + 11080723.

Almost surely, 2^{31475203007440} is an apocalyptic number.

It is an amenable number.

31475203007440 is an abundant number, since it is smaller than the sum of its proper divisors (44901334081328).

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

31475203007440 is a wasteful number, since it uses less digits than its factorization.

31475203007440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3350756 (or 3350750 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 40.

The spelling of 31475203007440 in words is "thirty-one trillion, four hundred seventy-five billion, two hundred three million, seven thousand, four hundred forty".