616571601 has 4 divisors (see below), whose sum is σ = 822095472. Its totient is φ = 411047732.

The previous prime is 616571573. The next prime is 616571609. The reversal of 616571601 is 106175616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 616571601 - 2¹⁵ = 616538833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616571609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102761931 + ... + 102761936.

It is an arithmetic number, because the mean of its divisors is an integer number (205523868).

Almost surely, 2^616571601 is an apocalyptic number.

It is an amenable number.

616571601 is a deficient number, since it is larger than the sum of its proper divisors (205523871).

616571601 is a wasteful number, since it uses less digits than its factorization.

616571601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205523870.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 616571601 is about 24830.8598522081. The cubic root of 616571601 is about 851.1272706725.

The spelling of 616571601 in words is "six hundred sixteen million, five hundred seventy-one thousand, six hundred one".