47157162649 has 3 divisors (see below), whose sum is σ = 47157379807. Its totient is φ = 47156945492.

The previous prime is 47157162593. The next prime is 47157162667. The reversal of 47157162649 is 94626175174.

The square root of 47157162649 is 217157.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94626175174 = 2 ⋅47313087587.

It can be written as a sum of positive squares in only one way, i.e., 47156294025 + 868624 = 217155^2 + 932^2 .

It is not a de Polignac number, because 47157162649 - 2¹⁵ = 47157129881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47157162596 and 47157162605.

It is not an unprimeable number, because it can be changed into a prime (47157162449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 108579 + ... + 325735.

Almost surely, 2^47157162649 is an apocalyptic number.

47157162649 is the 217157-th square number.

47157162649 is the 108579-th centered octagonal number.

It is an amenable number.

47157162649 is a deficient number, since it is larger than the sum of its proper divisors (217158).

47157162649 is an frugal number, since it uses more digits than its factorization.

47157162649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434314 (or 217157 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 52.

The spelling of 47157162649 in words is "forty-seven billion, one hundred fifty-seven million, one hundred sixty-two thousand, six hundred forty-nine".