61651661509196 has 24 divisors (see below), whose sum is σ = 117699129644544. Its totient is φ = 28023362712080.

The previous prime is 61651661509103. The next prime is 61651661509213. The reversal of 61651661509196 is 69190516615616.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7857101 + ... + 13602843.

It is an arithmetic number, because the mean of its divisors is an integer number (4904130401856).

Almost surely, 2^{61651661509196} is an apocalyptic number.

It is an amenable number.

61651661509196 is a deficient number, since it is larger than the sum of its proper divisors (56047468135348).

61651661509196 is a wasteful number, since it uses less digits than its factorization.

61651661509196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5989621 (or 5989619 counting only the distinct ones).

The product of its (nonzero) digits is 15746400, while the sum is 62.

The spelling of 61651661509196 in words is "sixty-one trillion, six hundred fifty-one billion, six hundred sixty-one million, five hundred nine thousand, one hundred ninety-six".