5157210661 has 4 divisors (see below), whose sum is σ = 5460576012. Its totient is φ = 4853845312.

The previous prime is 5157210649. The next prime is 5157210671. The reversal of 5157210661 is 1660127515.

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 4252344100 + 904866561 = 65210^2 + 30081^2 .

It is a cyclic number.

It is not a de Polignac number, because 5157210661 - 2¹³ = 5157202469 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 (5157210671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151682650 + ... + 151682683.

It is an arithmetic number, because the mean of its divisors is an integer number (1365144003).

Almost surely, 2^5157210661 is an apocalyptic number.

It is an amenable number.

5157210661 is a deficient number, since it is larger than the sum of its proper divisors (303365351).

5157210661 is a wasteful number, since it uses less digits than its factorization.

5157210661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303365350.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 5157210661 is about 71813.7219547908. The cubic root of 5157210661 is about 1727.7130909267.

The spelling of 5157210661 in words is "five billion, one hundred fifty-seven million, two hundred ten thousand, six hundred sixty-one".