11542731451 has 4 divisors (see below), whose sum is σ = 12221715672. Its totient is φ = 10863747232.

The previous prime is 11542731449. The next prime is 11542731461. The reversal of 11542731451 is 15413724511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15413724511 = 251 ⋅61409261.

It is a cyclic number.

It is not a de Polignac number, because 11542731451 - 2¹ = 11542731449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11542731461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339492085 + ... + 339492118.

It is an arithmetic number, because the mean of its divisors is an integer number (3055428918).

Almost surely, 2^11542731451 is an apocalyptic number.

11542731451 is a deficient number, since it is larger than the sum of its proper divisors (678984221).

11542731451 is an equidigital number, since it uses as much as digits as its factorization.

11542731451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678984220.

The product of its digits is 16800, while the sum is 34.

The spelling of 11542731451 in words is "eleven billion, five hundred forty-two million, seven hundred thirty-one thousand, four hundred fifty-one".