61815481323 has 8 divisors (see below), whose sum is σ = 82641610128. Its totient is φ = 41099836704.

The previous prime is 61815481307. The next prime is 61815481331. The reversal of 61815481323 is 32318451816.

It is a happy number.

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

It is not a de Polignac number, because 61815481323 - 2⁴ = 61815481307 is a prime.

It is a super-3 number, since 3×61815481323³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (61815481373) 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, 27619740 + ... + 27621977.

It is an arithmetic number, because the mean of its divisors is an integer number (10330201266).

Almost surely, 2^61815481323 is an apocalyptic number.

61815481323 is a deficient number, since it is larger than the sum of its proper divisors (20826128805).

61815481323 is a wasteful number, since it uses less digits than its factorization.

61815481323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55242093.

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

The spelling of 61815481323 in words is "sixty-one billion, eight hundred fifteen million, four hundred eighty-one thousand, three hundred twenty-three".