61109169141 has 16 divisors (see below), whose sum is σ = 84350332800. Its totient is φ = 39305786688.

The previous prime is 61109169137. The next prime is 61109169169. The reversal of 61109169141 is 14196190116.

It is not a de Polignac number, because 61109169141 - 2² = 61109169137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61109169141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61109169101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137986 + ... + 375843.

It is an arithmetic number, because the mean of its divisors is an integer number (5271895800).

Almost surely, 2^61109169141 is an apocalyptic number.

It is an amenable number.

61109169141 is a deficient number, since it is larger than the sum of its proper divisors (23241163659).

61109169141 is a wasteful number, since it uses less digits than its factorization.

61109169141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515228.

The product of its (nonzero) digits is 11664, while the sum is 39.

The spelling of 61109169141 in words is "sixty-one billion, one hundred nine million, one hundred sixty-nine thousand, one hundred forty-one".