11531509784954 has 32 divisors (see below), whose sum is σ = 17578859760000. Its totient is φ = 5672245178880.

The previous prime is 11531509784939. The next prime is 11531509784959. The reversal of 11531509784954 is 45948790513511.

It is not an unprimeable number, because it can be changed into a prime (11531509784959) 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, 729050054 + ... + 729065870.

It is an arithmetic number, because the mean of its divisors is an integer number (549339367500).

Almost surely, 2^{11531509784954} is an apocalyptic number.

11531509784954 is a deficient number, since it is larger than the sum of its proper divisors (6047349975046).

11531509784954 is a wasteful number, since it uses less digits than its factorization.

11531509784954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26678.

The product of its (nonzero) digits is 27216000, while the sum is 62.

The spelling of 11531509784954 in words is "eleven trillion, five hundred thirty-one billion, five hundred nine million, seven hundred eighty-four thousand, nine hundred fifty-four".