613121142635055 has 20 divisors (see below), whose sum is σ = 1099076418650232. Its totient is φ = 326997942738480.

The previous prime is 613121142635021. The next prime is 613121142635149. The reversal of 613121142635055 is 550536241121316.

It is a happy number.

613121142635055 is a `hidden beast` number, since 6 + 1 + 3 + 1 + 2 + 1 + 1 + 4 + 2 + 635 + 0 + 5 + 5 = 666.

It is not a de Polignac number, because 613121142635055 - 2⁹ = 613121142634543 is a prime.

It is a super-2 number, since 2×613121142635055² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 613121142635055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 756939681861 + ... + 756939682670.

Almost surely, 2^{613121142635055} is an apocalyptic number.

613121142635055 is a deficient number, since it is larger than the sum of its proper divisors (485955276015177).

613121142635055 is a wasteful number, since it uses less digits than its factorization.

613121142635055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513879364548 (or 1513879364539 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 613121142635055 in words is "six hundred thirteen trillion, one hundred twenty-one billion, one hundred forty-two million, six hundred thirty-five thousand, fifty-five".