31406140061540 has 96 divisors (see below), whose sum is σ = 70529417038080. Its totient is φ = 11705549193216.

The previous prime is 31406140061519. The next prime is 31406140061561. The reversal of 31406140061540 is 4516004160413.

It is an interprime number because it is at equal distance from previous prime (31406140061519) and next prime (31406140061561).

It is a self number, because there is not a number n which added to its sum of digits gives 31406140061540.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 132221924 + ... + 132459236.

It is an arithmetic number, because the mean of its divisors is an integer number (734681427480).

Almost surely, 2^{31406140061540} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31406140061540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35264708519040).

31406140061540 is an abundant number, since it is smaller than the sum of its proper divisors (39123276976540).

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

31406140061540 is a wasteful number, since it uses less digits than its factorization.

31406140061540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241221 (or 241219 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 31406140061540 in words is "thirty-one trillion, four hundred six billion, one hundred forty million, sixty-one thousand, five hundred forty".