1161504545 has 16 divisors (see below), whose sum is σ = 1420586640. Its totient is φ = 911520000.

The previous prime is 1161504541. The next prime is 1161504551. The reversal of 1161504545 is 5454051611.

It can be written as a sum of positive squares in 8 ways, for example, as 37847104 + 1123657441 = 6152^2 + 33521^2 .

It is not a de Polignac number, because 1161504545 - 2² = 1161504541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161504541) 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, 44495 + ... + 65595.

It is an arithmetic number, because the mean of its divisors is an integer number (88786665).

Almost surely, 2^1161504545 is an apocalyptic number.

It is an amenable number.

1161504545 is a deficient number, since it is larger than the sum of its proper divisors (259082095).

1161504545 is a wasteful number, since it uses less digits than its factorization.

1161504545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21316.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 1161504545 is about 34080.8530556381. The cubic root of 1161504545 is about 1051.1716460212.

The spelling of 1161504545 in words is "one billion, one hundred sixty-one million, five hundred four thousand, five hundred forty-five".