1155450551431 has 32 divisors (see below), whose sum is σ = 1327141532160. Its totient is φ = 1004000345920.

The previous prime is 1155450551273. The next prime is 1155450551441. The reversal of 1155450551431 is 1341550545511.

It is not a de Polignac number, because 1155450551431 - 2²⁹ = 1154913680519 is a prime.

It is a super-2 number, since 2×1155450551431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155450551441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43855260 + ... + 43881598.

It is an arithmetic number, because the mean of its divisors is an integer number (41473172880).

Almost surely, 2^{1155450551431} is an apocalyptic number.

1155450551431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1155450551431 is a deficient number, since it is larger than the sum of its proper divisors (171690980729).

1155450551431 is a wasteful number, since it uses less digits than its factorization.

1155450551431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27828 (or 27806 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 40.

The spelling of 1155450551431 in words is "one trillion, one hundred fifty-five billion, four hundred fifty million, five hundred fifty-one thousand, four hundred thirty-one".