31440165061 has 8 divisors (see below), whose sum is σ = 31855864320. Its totient is φ = 31026334848.

The previous prime is 31440164983. The next prime is 31440165079. The reversal of 31440165061 is 16056104413.

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

It is a cyclic number.

It is not a de Polignac number, because 31440165061 - 2⁷ = 31440164933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440165091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433381 + ... + 500698.

It is an arithmetic number, because the mean of its divisors is an integer number (3981983040).

Almost surely, 2^31440165061 is an apocalyptic number.

It is an amenable number.

31440165061 is a deficient number, since it is larger than the sum of its proper divisors (415699259).

31440165061 is an equidigital number, since it uses as much as digits as its factorization.

31440165061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934523.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 31440165061 its reverse (16056104413), we get a palindrome (47496269474).

The spelling of 31440165061 in words is "thirty-one billion, four hundred forty million, one hundred sixty-five thousand, sixty-one".