61467327021 has 4 divisors (see below), whose sum is σ = 81956436032. Its totient is φ = 40978218012.

The previous prime is 61467327013. The next prime is 61467327079. The reversal of 61467327021 is 12072376416.

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 61467327021 - 2³ = 61467327013 is a prime.

It is a super-2 number, since 2×61467327021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61467327001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10244554501 + ... + 10244554506.

It is an arithmetic number, because the mean of its divisors is an integer number (20489109008).

Almost surely, 2^61467327021 is an apocalyptic number.

It is an amenable number.

61467327021 is a deficient number, since it is larger than the sum of its proper divisors (20489109011).

61467327021 is a wasteful number, since it uses less digits than its factorization.

61467327021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20489109010.

The product of its (nonzero) digits is 84672, while the sum is 39.

The spelling of 61467327021 in words is "sixty-one billion, four hundred sixty-seven million, three hundred twenty-seven thousand, twenty-one".