61841974161 has 8 divisors (see below), whose sum is σ = 89951962464. Its totient is φ = 37479984320.

The previous prime is 61841974151. The next prime is 61841974169. The reversal of 61841974161 is 16147914816.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61841974161 - 2³⁰ = 60768232337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61841974161.

It is not an unprimeable number, because it can be changed into a prime (61841974169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 936999576 + ... + 936999641.

It is an arithmetic number, because the mean of its divisors is an integer number (11243995308).

Almost surely, 2^61841974161 is an apocalyptic number.

It is an amenable number.

61841974161 is a deficient number, since it is larger than the sum of its proper divisors (28109988303).

61841974161 is a wasteful number, since it uses less digits than its factorization.

61841974161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873999231.

The product of its digits is 290304, while the sum is 48.

The spelling of 61841974161 in words is "sixty-one billion, eight hundred forty-one million, nine hundred seventy-four thousand, one hundred sixty-one".