11520442315551 has 32 divisors (see below), whose sum is σ = 16877286784512. Its totient is φ = 6946766847360.

The previous prime is 11520442315537. The next prime is 11520442315573. The reversal of 11520442315551 is 15551324402511.

It is not a de Polignac number, because 11520442315551 - 2¹⁴ = 11520442299167 is a prime.

It is a super-2 number, since 2×11520442315551² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11520442315531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8580705 + ... + 9832058.

It is an arithmetic number, because the mean of its divisors is an integer number (527415212016).

Almost surely, 2^{11520442315551} is an apocalyptic number.

11520442315551 is a deficient number, since it is larger than the sum of its proper divisors (5356844468961).

11520442315551 is a wasteful number, since it uses less digits than its factorization.

11520442315551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18413103.

The product of its (nonzero) digits is 120000, while the sum is 39.

The spelling of 11520442315551 in words is "eleven trillion, five hundred twenty billion, four hundred forty-two million, three hundred fifteen thousand, five hundred fifty-one".