616400255 has 8 divisors (see below), whose sum is σ = 739921392. Its totient is φ = 492959488.

The previous prime is 616400243. The next prime is 616400269. The reversal of 616400255 is 552004616.

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

It is a cyclic number.

It is not a de Polignac number, because 616400255 - 2⁸ = 616399999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1682 + ... + 35151.

It is an arithmetic number, because the mean of its divisors is an integer number (92490174).

Almost surely, 2^616400255 is an apocalyptic number.

616400255 is a deficient number, since it is larger than the sum of its proper divisors (123521137).

616400255 is a wasteful number, since it uses less digits than its factorization.

616400255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40185.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 616400255 is about 24827.4093493461. The cubic root of 616400255 is about 851.0484202656.

The spelling of 616400255 in words is "six hundred sixteen million, four hundred thousand, two hundred fifty-five".