1611655011 has 24 divisors (see below), whose sum is σ = 2434906656. Its totient is φ = 1025291520.

The previous prime is 1611654959. The next prime is 1611655021. The reversal of 1611655011 is 1105561161.

1611655011 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 655 + 0 + 1 + 1 = 666.

It is not a de Polignac number, because 1611655011 - 2¹⁴ = 1611638627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1611655021) 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, 80641 + ... + 98621.

It is an arithmetic number, because the mean of its divisors is an integer number (101454444).

Almost surely, 2^1611655011 is an apocalyptic number.

1611655011 is a deficient number, since it is larger than the sum of its proper divisors (823251645).

1611655011 is a wasteful number, since it uses less digits than its factorization.

1611655011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18443 (or 18440 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The square root of 1611655011 is about 40145.4232883401. The cubic root of 1611655011 is about 1172.4401821933.

It can be divided in two parts, 161165 and 5011, that added together give a triangular number (166176 = T₅₇₆).

The spelling of 1611655011 in words is "one billion, six hundred eleven million, six hundred fifty-five thousand, eleven".