11451326145520 has 80 divisors (see below), whose sum is σ = 28028798497440. Its totient is φ = 4338956823552.

The previous prime is 11451326145451. The next prime is 11451326145521. The reversal of 11451326145520 is 2554162315411.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×11451326145520² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11451326145521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13093782 + ... + 13940938.

It is an arithmetic number, because the mean of its divisors is an integer number (350359981218).

Almost surely, 2^{11451326145520} is an apocalyptic number.

11451326145520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11451326145520 is an abundant number, since it is smaller than the sum of its proper divisors (16577472351920).

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

11451326145520 is a wasteful number, since it uses less digits than its factorization.

11451326145520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856082 (or 856076 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 11451326145520 in words is "eleven trillion, four hundred fifty-one billion, three hundred twenty-six million, one hundred forty-five thousand, five hundred twenty".