618801601 has 4 divisors (see below), whose sum is σ = 675056304. Its totient is φ = 562546900.

The previous prime is 618801583. The next prime is 618801607. The reversal of 618801601 is 106108816.

It is a happy number.

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 618801601 - 2¹⁵ = 618768833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618801607) 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, 28127335 + ... + 28127356.

It is an arithmetic number, because the mean of its divisors is an integer number (168764076).

Almost surely, 2^618801601 is an apocalyptic number.

It is an amenable number.

618801601 is a deficient number, since it is larger than the sum of its proper divisors (56254703).

618801601 is a wasteful number, since it uses less digits than its factorization.

618801601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56254702.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 618801601 is about 24875.7231251676. The cubic root of 618801601 is about 852.1521476797.

The spelling of 618801601 in words is "six hundred eighteen million, eight hundred one thousand, six hundred one".