613919728612 has 6 divisors (see below), whose sum is σ = 1074359525078. Its totient is φ = 306959864304.

The previous prime is 613919728573. The next prime is 613919728619. The reversal of 613919728612 is 216827919316.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 613753163776 + 166564836 = 783424^2 + 12906^2 .

It is not an unprimeable number, because it can be changed into a prime (613919728619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76739966073 + ... + 76739966080.

Almost surely, 2^613919728612 is an apocalyptic number.

It is an amenable number.

613919728612 is a deficient number, since it is larger than the sum of its proper divisors (460439796466).

613919728612 is a wasteful number, since it uses less digits than its factorization.

613919728612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153479932157 (or 153479932155 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 55.

The spelling of 613919728612 in words is "six hundred thirteen billion, nine hundred nineteen million, seven hundred twenty-eight thousand, six hundred twelve".