3601121818 has 12 divisors (see below), whose sum is σ = 6283590282. Its totient is φ = 1543337880.

The previous prime is 3601121767. The next prime is 3601121819. The reversal of 3601121818 is 8181211063.

It can be written as a sum of positive squares in only one way, i.e., 2025270009 + 1575851809 = 45003^2 + 39697^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3601121818.

It is not an unprimeable number, because it can be changed into a prime (3601121819) 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, 18372973 + ... + 18373168.

Almost surely, 2^3601121818 is an apocalyptic number.

3601121818 is a deficient number, since it is larger than the sum of its proper divisors (2682468464).

3601121818 is a wasteful number, since it uses less digits than its factorization.

3601121818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36746157 (or 36746150 counting only the distinct ones).

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

The square root of 3601121818 is about 60009.3477551623. The cubic root of 3601121818 is about 1532.7780444974.

The spelling of 3601121818 in words is "three billion, six hundred one million, one hundred twenty-one thousand, eight hundred eighteen".