61328437149571 has 4 divisors (see below), whose sum is σ = 61435842469144. Its totient is φ = 61221031830000.

The previous prime is 61328437149517. The next prime is 61328437149593. The reversal of 61328437149571 is 17594173482316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61328437149571 - 2⁷ = 61328437149443 is a prime.

It is a super-2 number, since 2×61328437149571² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61328437189571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53702658930 + ... + 53702660071.

It is an arithmetic number, because the mean of its divisors is an integer number (15358960617286).

Almost surely, 2^{61328437149571} is an apocalyptic number.

61328437149571 is a deficient number, since it is larger than the sum of its proper divisors (107405319573).

61328437149571 is a wasteful number, since it uses less digits than its factorization.

61328437149571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107405319572.

The product of its digits is 30481920, while the sum is 61.

The spelling of 61328437149571 in words is "sixty-one trillion, three hundred twenty-eight billion, four hundred thirty-seven million, one hundred forty-nine thousand, five hundred seventy-one".