61815481326 has 12 divisors (see below), whose sum is σ = 133933542912. Its totient is φ = 20605160436.

The previous prime is 61815481307. The next prime is 61815481331. The reversal of 61815481326 is 62318451816.

61815481326 is a `hidden beast` number, since 6 + 1 + 81 + 548 + 1 + 3 + 26 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1717096686 + ... + 1717096721.

It is an arithmetic number, because the mean of its divisors is an integer number (11161128576).

Almost surely, 2^61815481326 is an apocalyptic number.

61815481326 is an abundant number, since it is smaller than the sum of its proper divisors (72118061586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61815481326 is a wasteful number, since it uses less digits than its factorization.

61815481326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3434193415 (or 3434193412 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The spelling of 61815481326 in words is "sixty-one billion, eight hundred fifteen million, four hundred eighty-one thousand, three hundred twenty-six".