6155454661 has 4 divisors (see below), whose sum is σ = 6170805324. Its totient is φ = 6140104000.

The previous prime is 6155454629. The next prime is 6155454691. The reversal of 6155454661 is 1664545516.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5521976100 + 633478561 = 74310^2 + 25169^2 .

It is a cyclic number.

It is not a de Polignac number, because 6155454661 - 2⁵ = 6155454629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6155454691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7674730 + ... + 7675531.

It is an arithmetic number, because the mean of its divisors is an integer number (1542701331).

Almost surely, 2^6155454661 is an apocalyptic number.

It is an amenable number.

6155454661 is a deficient number, since it is larger than the sum of its proper divisors (15350663).

6155454661 is a wasteful number, since it uses less digits than its factorization.

6155454661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15350662.

The product of its digits is 432000, while the sum is 43.

The square root of 6155454661 is about 78456.7056471274. The cubic root of 6155454661 is about 1832.6803031292.

The spelling of 6155454661 in words is "six billion, one hundred fifty-five million, four hundred fifty-four thousand, six hundred sixty-one".