1655000001 has 12 divisors (see below), whose sum is σ = 2392019812. Its totient is φ = 1102657536.

The previous prime is 1654999999. The next prime is 1655000041. The reversal of 1655000001 is 1000005561.

1655000001 is a `hidden beast` number, since 165 + 500 + 0 + 0 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 839840400 + 815159601 = 28980^2 + 28551^2 .

It is not a de Polignac number, because 1655000001 - 2¹ = 1654999999 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1655000041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40576 + ... + 70401.

Almost surely, 2^1655000001 is an apocalyptic number.

It is an amenable number.

1655000001 is a deficient number, since it is larger than the sum of its proper divisors (737019811).

1655000001 is a wasteful number, since it uses less digits than its factorization.

1655000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112640 (or 112637 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 1655000001 is about 40681.6912259065. The cubic root of 1655000001 is about 1182.8581488412.

Adding to 1655000001 its reverse (1000005561), we get a palindrome (2655005562).

The spelling of 1655000001 in words is "one billion, six hundred fifty-five million, one", and thus it is an aban number.