61296764385081 has 4 divisors (see below), whose sum is σ = 81729019180112. Its totient is φ = 40864509590052.

The previous prime is 61296764385049. The next prime is 61296764385083. The reversal of 61296764385081 is 18058346769216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61296764385081 - 2⁵ = 61296764385049 is a prime.

It is a super-3 number, since 3×61296764385081³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61296764385083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10216127397511 + ... + 10216127397516.

It is an arithmetic number, because the mean of its divisors is an integer number (20432254795028).

It is a 1-persistent number, because it is pandigital, but 2⋅61296764385081 = 122593528770162 is not.

Almost surely, 2^{61296764385081} is an apocalyptic number.

It is an amenable number.

61296764385081 is a deficient number, since it is larger than the sum of its proper divisors (20432254795031).

61296764385081 is a wasteful number, since it uses less digits than its factorization.

61296764385081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20432254795030.

The product of its (nonzero) digits is 104509440, while the sum is 66.

The spelling of 61296764385081 in words is "sixty-one trillion, two hundred ninety-six billion, seven hundred sixty-four million, three hundred eighty-five thousand, eighty-one".