61467308081 has 4 divisors (see below), whose sum is σ = 61879840500. Its totient is φ = 61054775664.

The previous prime is 61467308069. The next prime is 61467308137. The reversal of 61467308081 is 18080376416.

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 6065917456 + 55401390625 = 77884^2 + 235375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61467308081 is a prime.

It is a super-2 number, since 2×61467308081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61467308041) by changing a digit.

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, 206265986 + ... + 206266283.

It is an arithmetic number, because the mean of its divisors is an integer number (15469960125).

Almost surely, 2^61467308081 is an apocalyptic number.

It is an amenable number.

61467308081 is a deficient number, since it is larger than the sum of its proper divisors (412532419).

61467308081 is a wasteful number, since it uses less digits than its factorization.

61467308081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412532418.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 61467308081 in words is "sixty-one billion, four hundred sixty-seven million, three hundred eight thousand, eighty-one".