10615812317981 has 4 divisors (see below), whose sum is σ = 11432413265532. Its totient is φ = 9799211370432.

The previous prime is 10615812317959. The next prime is 10615812318011. The reversal of 10615812317981 is 18971321851601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6661715860900 + 3954096457081 = 2581030^2 + 1988491^2 .

It is a cyclic number.

It is not a de Polignac number, because 10615812317981 - 2¹⁸ = 10615812055837 is a prime.

It is a super-2 number, since 2×10615812317981² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10615812317681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408300473756 + ... + 408300473781.

It is an arithmetic number, because the mean of its divisors is an integer number (2858103316383).

Almost surely, 2^{10615812317981} is an apocalyptic number.

It is an amenable number.

10615812317981 is a deficient number, since it is larger than the sum of its proper divisors (816600947551).

10615812317981 is an equidigital number, since it uses as much as digits as its factorization.

10615812317981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816600947550.

The product of its (nonzero) digits is 725760, while the sum is 53.

The spelling of 10615812317981 in words is "ten trillion, six hundred fifteen billion, eight hundred twelve million, three hundred seventeen thousand, nine hundred eighty-one".