5154351661 has 8 divisors (see below), whose sum is σ = 5253839864. Its totient is φ = 5055644160.

The previous prime is 5154351641. The next prime is 5154351721. The reversal of 5154351661 is 1661534515.

It can be written as a sum of positive squares in 4 ways, for example, as 249450436 + 4904901225 = 15794^2 + 70035^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 5154351661 - 2²⁷ = 5020133933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5154351661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5154351611) 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, 181836 + ... + 208261.

It is an arithmetic number, because the mean of its divisors is an integer number (656729983).

Almost surely, 2^5154351661 is an apocalyptic number.

It is an amenable number.

5154351661 is a deficient number, since it is larger than the sum of its proper divisors (99488203).

5154351661 is a wasteful number, since it uses less digits than its factorization.

5154351661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390351.

The product of its digits is 54000, while the sum is 37.

The square root of 5154351661 is about 71793.8135287435. The cubic root of 5154351661 is about 1727.3937681307.

The spelling of 5154351661 in words is "five billion, one hundred fifty-four million, three hundred fifty-one thousand, six hundred sixty-one".