61455440206 has 8 divisors (see below), whose sum is σ = 92184253920. Its totient is φ = 30727355568.

The previous prime is 61455440197. The next prime is 61455440261. The reversal of 61455440206 is 60204455416.

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

It is a super-2 number, since 2×61455440206² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 148555 + ... + 380761.

It is an arithmetic number, because the mean of its divisors is an integer number (11523031740).

Almost surely, 2^61455440206 is an apocalyptic number.

61455440206 is a deficient number, since it is larger than the sum of its proper divisors (30728813714).

61455440206 is a wasteful number, since it uses less digits than its factorization.

61455440206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364538.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 61455440206 in words is "sixty-one billion, four hundred fifty-five million, four hundred forty thousand, two hundred six".