31440545541 has 12 divisors (see below), whose sum is σ = 45463018380. Its totient is φ = 20937795840.

The previous prime is 31440545471. The next prime is 31440545561. The reversal of 31440545541 is 14554504413.

31440545541 is a `hidden beast` number, since 3 + 14 + 40 + 54 + 554 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14109876225 + 17330669316 = 118785^2 + 131646^2 .

It is not a de Polignac number, because 31440545541 - 2¹⁰ = 31440544517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31440545496 and 31440545505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440545561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1871830 + ... + 1888551.

It is an arithmetic number, because the mean of its divisors is an integer number (3788584865).

Almost surely, 2^31440545541 is an apocalyptic number.

It is an amenable number.

31440545541 is a deficient number, since it is larger than the sum of its proper divisors (14022472839).

31440545541 is a wasteful number, since it uses less digits than its factorization.

31440545541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3761316 (or 3761313 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 31440545541 in words is "thirty-one billion, four hundred forty million, five hundred forty-five thousand, five hundred forty-one".