61610869161 has 8 divisors (see below), whose sum is σ = 91275361760. Its totient is φ = 41073912756.

The previous prime is 61610869153. The next prime is 61610869181. The reversal of 61610869161 is 16196801616.

It is a happy number.

61610869161 is a `hidden beast` number, since 616 + 10 + 8 + 6 + 9 + 16 + 1 = 666.

It is not a de Polignac number, because 61610869161 - 2³ = 61610869153 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61610869181) 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, 1140941995 + ... + 1140942048.

It is an arithmetic number, because the mean of its divisors is an integer number (11409420220).

Almost surely, 2^61610869161 is an apocalyptic number.

It is an amenable number.

61610869161 is a deficient number, since it is larger than the sum of its proper divisors (29664492599).

61610869161 is a wasteful number, since it uses less digits than its factorization.

61610869161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281884052 (or 2281884046 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 61610869161 in words is "sixty-one billion, six hundred ten million, eight hundred sixty-nine thousand, one hundred sixty-one".