11545042551 has 8 divisors (see below), whose sum is σ = 17592445824. Its totient is φ = 6597167160.

The previous prime is 11545042547. The next prime is 11545042577. The reversal of 11545042551 is 15524054511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11545042551 - 2² = 11545042547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11545042501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274881945 + ... + 274881986.

It is an arithmetic number, because the mean of its divisors is an integer number (2199055728).

Almost surely, 2^11545042551 is an apocalyptic number.

11545042551 is a deficient number, since it is larger than the sum of its proper divisors (6047403273).

11545042551 is an equidigital number, since it uses as much as digits as its factorization.

11545042551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549763941.

The product of its (nonzero) digits is 20000, while the sum is 33.

The spelling of 11545042551 in words is "eleven billion, five hundred forty-five million, forty-two thousand, five hundred fifty-one".