1156536451 has 16 divisors (see below), whose sum is σ = 1330205184. Its totient is φ = 985002624.

The previous prime is 1156536431. The next prime is 1156536457. The reversal of 1156536451 is 1546356511.

It is a cyclic number.

It is not a de Polignac number, because 1156536451 - 2¹¹ = 1156534403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1156536451.

It is not an unprimeable number, because it can be changed into a prime (1156536457) 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, 1183275 + ... + 1184251.

It is an arithmetic number, because the mean of its divisors is an integer number (83137824).

Almost surely, 2^1156536451 is an apocalyptic number.

1156536451 is a deficient number, since it is larger than the sum of its proper divisors (173668733).

1156536451 is an equidigital number, since it uses as much as digits as its factorization.

1156536451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890.

The product of its digits is 54000, while the sum is 37.

The square root of 1156536451 is about 34007.8880702698. Note that the first 3 decimals coincide. The cubic root of 1156536451 is about 1049.6707814432.

The spelling of 1156536451 in words is "one billion, one hundred fifty-six million, five hundred thirty-six thousand, four hundred fifty-one".