9040513261 has 4 divisors (see below), whose sum is σ = 9735937372. Its totient is φ = 8345089152.

The previous prime is 9040513189. The next prime is 9040513297. The reversal of 9040513261 is 1623150409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1623150409 = 719 ⋅2257511.

It can be written as a sum of positive squares in 2 ways, for example, as 3710637225 + 5329876036 = 60915^2 + 73006^2 .

It is a cyclic number.

It is not a de Polignac number, because 9040513261 - 2¹³ = 9040505069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9040513661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347712036 + ... + 347712061.

It is an arithmetic number, because the mean of its divisors is an integer number (2433984343).

Almost surely, 2^9040513261 is an apocalyptic number.

It is an amenable number.

9040513261 is a deficient number, since it is larger than the sum of its proper divisors (695424111).

9040513261 is a wasteful number, since it uses less digits than its factorization.

9040513261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695424110.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 9040513261 is about 95081.6136852967. The cubic root of 9040513261 is about 2083.2002988387.

The spelling of 9040513261 in words is "nine billion, forty million, five hundred thirteen thousand, two hundred sixty-one".