11515321406145 has 16 divisors (see below), whose sum is σ = 18424602392832. Its totient is φ = 6141475368960.

The previous prime is 11515321406081. The next prime is 11515321406221. The reversal of 11515321406145 is 54160412351511.

It is not a de Polignac number, because 11515321406145 - 2⁶ = 11515321406081 is a prime.

It is a super-2 number, since 2×11515321406145² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1612609 + ... + 5062721.

It is an arithmetic number, because the mean of its divisors is an integer number (1151537649552).

Almost surely, 2^{11515321406145} is an apocalyptic number.

11515321406145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11515321406145 is a deficient number, since it is larger than the sum of its proper divisors (6909280986687).

11515321406145 is a wasteful number, since it uses less digits than its factorization.

11515321406145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3672632.

The product of its (nonzero) digits is 72000, while the sum is 39.

Adding to 11515321406145 its reverse (54160412351511), we get a palindrome (65675733757656).

The spelling of 11515321406145 in words is "eleven trillion, five hundred fifteen billion, three hundred twenty-one million, four hundred six thousand, one hundred forty-five".