1131552454509 has 24 divisors (see below), whose sum is σ = 1704798137952. Its totient is φ = 750007764720.

The previous prime is 1131552454493. The next prime is 1131552454559. The reversal of 1131552454509 is 9054542551311.

1131552454509 is a `hidden beast` number, since 1 + 1 + 3 + 1 + 552 + 45 + 4 + 50 + 9 = 666.

It is not a de Polignac number, because 1131552454509 - 2⁴ = 1131552454493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131552454559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13416327 + ... + 13500404.

It is an arithmetic number, because the mean of its divisors is an integer number (71033255748).

Almost surely, 2^{1131552454509} is an apocalyptic number.

It is an amenable number.

1131552454509 is a deficient number, since it is larger than the sum of its proper divisors (573245683443).

1131552454509 is an equidigital number, since it uses as much as digits as its factorization.

1131552454509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26916919 (or 26916907 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 45.

The spelling of 1131552454509 in words is "one trillion, one hundred thirty-one billion, five hundred fifty-two million, four hundred fifty-four thousand, five hundred nine".