1155404450531 has 4 divisors (see below), whose sum is σ = 1155874320600. Its totient is φ = 1154934580464.

The previous prime is 1155404450521. The next prime is 1155404450537. The reversal of 1155404450531 is 1350544045511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1155404450531 - 2¹⁴ = 1155404434147 is a prime.

It is a super-2 number, since 2×1155404450531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155404450537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234931346 + ... + 234936263.

It is an arithmetic number, because the mean of its divisors is an integer number (288968580150).

Almost surely, 2^{1155404450531} is an apocalyptic number.

1155404450531 is a deficient number, since it is larger than the sum of its proper divisors (469870069).

1155404450531 is an equidigital number, since it uses as much as digits as its factorization.

1155404450531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469870068.

The product of its (nonzero) digits is 120000, while the sum is 38.

The spelling of 1155404450531 in words is "one trillion, one hundred fifty-five billion, four hundred four million, four hundred fifty thousand, five hundred thirty-one".