61651661509195 has 8 divisors (see below), whose sum is σ = 73982046201840. Its totient is φ = 49321294280160.

The previous prime is 61651661509103. The next prime is 61651661509213. The reversal of 61651661509195 is 59190516615616.

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

It is not a de Polignac number, because 61651661509195 - 2⁹ = 61651661508683 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5377521 + ... + 12337789.

It is an arithmetic number, because the mean of its divisors is an integer number (9247755775230).

Almost surely, 2^{61651661509195} is an apocalyptic number.

61651661509195 is a deficient number, since it is larger than the sum of its proper divisors (12330384692645).

61651661509195 is a wasteful number, since it uses less digits than its factorization.

61651661509195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8731805.

The product of its (nonzero) digits is 13122000, while the sum is 61.

The spelling of 61651661509195 in words is "sixty-one trillion, six hundred fifty-one billion, six hundred sixty-one million, five hundred nine thousand, one hundred ninety-five".