61452928821 has 8 divisors (see below), whose sum is σ = 81986338720. Its totient is φ = 40944069072.

The previous prime is 61452928811. The next prime is 61452928847. The reversal of 61452928821 is 12882925416.

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

It is not a de Polignac number, because 61452928821 - 2¹⁰ = 61452927797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61452928811) 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, 6131695 + ... + 6141708.

It is an arithmetic number, because the mean of its divisors is an integer number (10248292340).

Almost surely, 2^61452928821 is an apocalyptic number.

It is an amenable number.

61452928821 is a deficient number, since it is larger than the sum of its proper divisors (20533409899).

61452928821 is a wasteful number, since it uses less digits than its factorization.

61452928821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12275075.

The product of its digits is 552960, while the sum is 48.

The spelling of 61452928821 in words is "sixty-one billion, four hundred fifty-two million, nine hundred twenty-eight thousand, eight hundred twenty-one".