1165640041525 has 6 divisors (see below), whose sum is σ = 1445393651522. Its totient is φ = 932512033200.

The previous prime is 1165640041499. The next prime is 1165640041529. The reversal of 1165640041525 is 5251400465611.

It can be written as a sum of positive squares in 3 ways, for example, as 252847059921 + 912792981604 = 502839^2 + 955402^2 .

It is not a de Polignac number, because 1165640041525 - 2¹¹ = 1165640039477 is a prime.

It is a super-4 number, since 4×1165640041525⁴ (a number of 49 digits) contains 4444 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 (1165640041529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23312800806 + ... + 23312800855.

Almost surely, 2^{1165640041525} is an apocalyptic number.

It is an amenable number.

1165640041525 is a deficient number, since it is larger than the sum of its proper divisors (279753609997).

1165640041525 is an equidigital number, since it uses as much as digits as its factorization.

1165640041525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46625601671 (or 46625601666 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 1165640041525 in words is "one trillion, one hundred sixty-five billion, six hundred forty million, forty-one thousand, five hundred twenty-five".