2365610151661 has 4 divisors (see below), whose sum is σ = 2504763690012. Its totient is φ = 2226456613312.

The previous prime is 2365610151649. The next prime is 2365610151701. The reversal of 2365610151661 is 1661510165632.

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

It can be written as a sum of positive squares in 2 ways, for example, as 709418752900 + 1656191398761 = 842270^2 + 1286931^2 .

It is a cyclic number.

It is not a de Polignac number, because 2365610151661 - 2²³ = 2365601763053 is a prime.

It is a super-2 number, since 2×2365610151661² (a number of 26 digits) contains 22 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 (2365610151631) 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, 69576769150 + ... + 69576769183.

It is an arithmetic number, because the mean of its divisors is an integer number (626190922503).

Almost surely, 2^{2365610151661} is an apocalyptic number.

It is an amenable number.

2365610151661 is a deficient number, since it is larger than the sum of its proper divisors (139153538351).

2365610151661 is a wasteful number, since it uses less digits than its factorization.

2365610151661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139153538350.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 2365610151661 in words is "two trillion, three hundred sixty-five billion, six hundred ten million, one hundred fifty-one thousand, six hundred sixty-one".