61161616001 has 4 divisors (see below), whose sum is σ = 61163902212. Its totient is φ = 61159329792.

The previous prime is 61161615997. The next prime is 61161616003. The reversal of 61161616001 is 10061616116.

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 34649961025 + 26511654976 = 186145^2 + 162824^2 .

It is a cyclic number.

It is not a de Polignac number, because 61161616001 - 2² = 61161615997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61161616003) 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, 1102496 + ... + 1156641.

It is an arithmetic number, because the mean of its divisors is an integer number (15290975553).

Almost surely, 2^61161616001 is an apocalyptic number.

It is an amenable number.

61161616001 is a deficient number, since it is larger than the sum of its proper divisors (2286211).

61161616001 is a wasteful number, since it uses less digits than its factorization.

61161616001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2286210.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 61161616001 in words is "sixty-one billion, one hundred sixty-one million, six hundred sixteen thousand, one".