61331492321 has 8 divisors (see below), whose sum is σ = 68041101600. Its totient is φ = 54810886240.

The previous prime is 61331492303. The next prime is 61331492353. The reversal of 61331492321 is 12329413316.

61331492321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-61331492321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61331492021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47250116 + ... + 47251413.

It is an arithmetic number, because the mean of its divisors is an integer number (8505137700).

Almost surely, 2^61331492321 is an apocalyptic number.

It is an amenable number.

61331492321 is a deficient number, since it is larger than the sum of its proper divisors (6709609279).

61331492321 is a wasteful number, since it uses less digits than its factorization.

61331492321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94501599.

The product of its digits is 23328, while the sum is 35.

The spelling of 61331492321 in words is "sixty-one billion, three hundred thirty-one million, four hundred ninety-two thousand, three hundred twenty-one".