617520055 has 16 divisors (see below), whose sum is σ = 769538880. Its totient is φ = 475138048.

The previous prime is 617520049. The next prime is 617520089. The reversal of 617520055 is 550025716.

It is a cyclic number.

It is not a de Polignac number, because 617520055 - 2⁵ = 617520023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 617519999 and 617520026.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30039 + ... + 46231.

It is an arithmetic number, because the mean of its divisors is an integer number (48096180).

Almost surely, 2^617520055 is an apocalyptic number.

617520055 is a deficient number, since it is larger than the sum of its proper divisors (152018825).

617520055 is a wasteful number, since it uses less digits than its factorization.

617520055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16490.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 617520055 is about 24849.9508047803. The cubic root of 617520055 is about 851.5634684533.

The spelling of 617520055 in words is "six hundred seventeen million, five hundred twenty thousand, fifty-five".