61555003161 has 16 divisors (see below), whose sum is σ = 83019674880. Its totient is φ = 40563768960.

The previous prime is 61555003127. The next prime is 61555003199. The reversal of 61555003161 is 16130055516.

It is not a de Polignac number, because 61555003161 - 2¹⁰ = 61555002137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61555003261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 937731 + ... + 1001223.

It is an arithmetic number, because the mean of its divisors is an integer number (5188729680).

Almost surely, 2^61555003161 is an apocalyptic number.

It is an amenable number.

61555003161 is a deficient number, since it is larger than the sum of its proper divisors (21464671719).

61555003161 is a wasteful number, since it uses less digits than its factorization.

61555003161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67216.

The product of its (nonzero) digits is 13500, while the sum is 33.

Adding to 61555003161 its reverse (16130055516), we get a palindrome (77685058677).

The spelling of 61555003161 in words is "sixty-one billion, five hundred fifty-five million, three thousand, one hundred sixty-one".