616594401 has 6 divisors (see below), whose sum is σ = 890636370. Its totient is φ = 411062928.

The previous prime is 616594399. The next prime is 616594411. The reversal of 616594401 is 104495616.

616594401 is a `hidden beast` number, since 6 + 165 + 94 + 401 = 666.

It can be written as a sum of positive squares in only one way, i.e., 558849600 + 57744801 = 23640^2 + 7599^2 .

It is not a de Polignac number, because 616594401 - 2¹ = 616594399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616594411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34255236 + ... + 34255253.

It is an arithmetic number, because the mean of its divisors is an integer number (148439395).

Almost surely, 2^616594401 is an apocalyptic number.

It is an amenable number.

616594401 is a deficient number, since it is larger than the sum of its proper divisors (274041969).

616594401 is a wasteful number, since it uses less digits than its factorization.

616594401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68510495 (or 68510492 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 616594401 is about 24831.3189540950. The cubic root of 616594401 is about 851.1377617290.

The spelling of 616594401 in words is "six hundred sixteen million, five hundred ninety-four thousand, four hundred one".