61641521674115 has 16 divisors (see below), whose sum is σ = 74157056782848. Its totient is φ = 49188528850656.

The previous prime is 61641521674099. The next prime is 61641521674123. The reversal of 61641521674115 is 51147612514616.

It is a cyclic number.

It is not a de Polignac number, because 61641521674115 - 2⁴ = 61641521674099 is a prime.

It is a super-2 number, since 2×61641521674115² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4515257 + ... + 11986266.

It is an arithmetic number, because the mean of its divisors is an integer number (4634816048928).

Almost surely, 2^{61641521674115} is an apocalyptic number.

61641521674115 is a deficient number, since it is larger than the sum of its proper divisors (12515535108733).

61641521674115 is a wasteful number, since it uses less digits than its factorization.

61641521674115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16503418.

The product of its digits is 1209600, while the sum is 50.

The spelling of 61641521674115 in words is "sixty-one trillion, six hundred forty-one billion, five hundred twenty-one million, six hundred seventy-four thousand, one hundred fifteen".