61082813325021 has 4 divisors (see below), whose sum is σ = 81443751100032. Its totient is φ = 40721875550012.

The previous prime is 61082813324983. The next prime is 61082813325067. The reversal of 61082813325021 is 12052331828016.

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 a cyclic number.

It is not a de Polignac number, because 61082813325021 - 2⁷ = 61082813324893 is a prime.

It is a super-2 number, since 2×61082813325021² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61082813315021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10180468887501 + ... + 10180468887506.

It is an arithmetic number, because the mean of its divisors is an integer number (20360937775008).

Almost surely, 2^{61082813325021} is an apocalyptic number.

It is an amenable number.

61082813325021 is a deficient number, since it is larger than the sum of its proper divisors (20360937775011).

61082813325021 is a wasteful number, since it uses less digits than its factorization.

61082813325021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20360937775010.

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 61082813325021 in words is "sixty-one trillion, eighty-two billion, eight hundred thirteen million, three hundred twenty-five thousand, twenty-one".