1618617801 has 24 divisors (see below), whose sum is σ = 2260947136. Its totient is φ = 1029932640.

The previous prime is 1618617779. The next prime is 1618617817. The reversal of 1618617801 is 1087168161.

It is not a de Polignac number, because 1618617801 - 2⁵ = 1618617769 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1618617801.

It is not an unprimeable number, because it can be changed into a prime (1618617841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1048236 + ... + 1049778.

Almost surely, 2^1618617801 is an apocalyptic number.

It is an amenable number.

1618617801 is a deficient number, since it is larger than the sum of its proper divisors (642329335).

1618617801 is a wasteful number, since it uses less digits than its factorization.

1618617801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253 (or 2230 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 39.

The square root of 1618617801 is about 40232.0494257998. The cubic root of 1618617801 is about 1174.1261771772.

The spelling of 1618617801 in words is "one billion, six hundred eighteen million, six hundred seventeen thousand, eight hundred one".