61328395075921 has 8 divisors (see below), whose sum is σ = 61918016855904. Its totient is φ = 60739078096320.

The previous prime is 61328395075919. The next prime is 61328395075931. The reversal of 61328395075921 is 12957059382316.

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

It is a cyclic number.

It is not a de Polignac number, because 61328395075921 - 2¹ = 61328395075919 is a prime.

It is a super-2 number, since 2×61328395075921² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61328395075921.

It is not an unprimeable number, because it can be changed into a prime (61328395075931) 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 7 ways as a sum of consecutive naturals, for example, 75795735 + ... + 76600588.

It is an arithmetic number, because the mean of its divisors is an integer number (7739752106988).

Almost surely, 2^{61328395075921} is an apocalyptic number.

It is an amenable number.

61328395075921 is a deficient number, since it is larger than the sum of its proper divisors (589621779983).

61328395075921 is a wasteful number, since it uses less digits than its factorization.

61328395075921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152400191.

The product of its (nonzero) digits is 24494400, while the sum is 61.

The spelling of 61328395075921 in words is "sixty-one trillion, three hundred twenty-eight billion, three hundred ninety-five million, seventy-five thousand, nine hundred twenty-one".