1611550641 has 16 divisors (see below), whose sum is σ = 2159118720. Its totient is φ = 1069188480.

The previous prime is 1611550627. The next prime is 1611550723. The reversal of 1611550641 is 1460551161.

It is not a de Polignac number, because 1611550641 - 2⁵ = 1611550609 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1611550599 and 1611550608.

It is not an unprimeable number, because it can be changed into a prime (1611350641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 658981 + ... + 661421.

It is an arithmetic number, because the mean of its divisors is an integer number (134944920).

Almost surely, 2^1611550641 is an apocalyptic number.

It is an amenable number.

1611550641 is a deficient number, since it is larger than the sum of its proper divisors (547568079).

1611550641 is a wasteful number, since it uses less digits than its factorization.

1611550641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 1611550641 is about 40144.1233681843. The cubic root of 1611550641 is about 1172.4148727603.

The spelling of 1611550641 in words is "one billion, six hundred eleven million, five hundred fifty thousand, six hundred forty-one".