11515140531344 has 20 divisors (see below), whose sum is σ = 22310642741760. Its totient is φ = 5757555307680.

The previous prime is 11515140531343. The next prime is 11515140531409. The reversal of 11515140531344 is 44313504151511.

It is a super-2 number, since 2×11515140531344² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11515140531298 and 11515140531307.

It is not an unprimeable number, because it can be changed into a prime (11515140531343) 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, 8009297 + ... + 9336975.

It is an arithmetic number, because the mean of its divisors is an integer number (1115532137088).

Almost surely, 2^{11515140531344} is an apocalyptic number.

It is an amenable number.

11515140531344 is a deficient number, since it is larger than the sum of its proper divisors (10795502210416).

11515140531344 is a wasteful number, since it uses less digits than its factorization.

11515140531344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869758 (or 1869752 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

Adding to 11515140531344 its reverse (44313504151511), we get a palindrome (55828644682855).

The spelling of 11515140531344 in words is "eleven trillion, five hundred fifteen billion, one hundred forty million, five hundred thirty-one thousand, three hundred forty-four".