61165434441 has 4 divisors (see below), whose sum is σ = 81553912592. Its totient is φ = 40776956292.

The previous prime is 61165434439. The next prime is 61165434469. The reversal of 61165434441 is 14443456116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61165434441 - 2¹ = 61165434439 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61165434441.

It is not an unprimeable number, because it can be changed into a prime (61165434041) 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, 10194239071 + ... + 10194239076.

It is an arithmetic number, because the mean of its divisors is an integer number (20388478148).

Almost surely, 2^61165434441 is an apocalyptic number.

It is an amenable number.

61165434441 is a deficient number, since it is larger than the sum of its proper divisors (20388478151).

61165434441 is a wasteful number, since it uses less digits than its factorization.

61165434441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20388478150.

The product of its digits is 138240, while the sum is 39.

The spelling of 61165434441 in words is "sixty-one billion, one hundred sixty-five million, four hundred thirty-four thousand, four hundred forty-one".