61165023947089 has 4 divisors (see below), whose sum is σ = 61338295969956. Its totient is φ = 60991751924224.

The previous prime is 61165023947059. The next prime is 61165023947177. The reversal of 61165023947089 is 98074932056116.

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 22107111312400 + 39057912634689 = 4701820^2 + 6249633^2 .

It is a cyclic number.

It is not a de Polignac number, because 61165023947089 - 2²⁵ = 61164990392657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61165023947059) 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, 86636010904 + ... + 86636011609.

It is an arithmetic number, because the mean of its divisors is an integer number (15334573992489).

It is a 1-persistent number, because it is pandigital, but 2⋅61165023947089 = 122330047894178 is not.

Almost surely, 2^{61165023947089} is an apocalyptic number.

It is an amenable number.

61165023947089 is a deficient number, since it is larger than the sum of its proper divisors (173272022867).

61165023947089 is a wasteful number, since it uses less digits than its factorization.

61165023947089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173272022866.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 61165023947089 in words is "sixty-one trillion, one hundred sixty-five billion, twenty-three million, nine hundred forty-seven thousand, eighty-nine".