6155553561 has 8 divisors (see below), whose sum is σ = 8208841344. Its totient is φ = 4102984080.

The previous prime is 6155553559. The next prime is 6155553577. The reversal of 6155553561 is 1653555516.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6155553561 - 2¹ = 6155553559 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (6155551561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159250 + ... + 194091.

It is an arithmetic number, because the mean of its divisors is an integer number (1026105168).

Almost surely, 2^6155553561 is an apocalyptic number.

It is an amenable number.

6155553561 is a deficient number, since it is larger than the sum of its proper divisors (2053287783).

6155553561 is a wasteful number, since it uses less digits than its factorization.

6155553561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359151.

The product of its digits is 337500, while the sum is 42.

The square root of 6155553561 is about 78457.3359285160. The cubic root of 6155553561 is about 1832.6901183322.

The spelling of 6155553561 in words is "six billion, one hundred fifty-five million, five hundred fifty-three thousand, five hundred sixty-one".