5138165761 has 9 divisors (see below), whose sum is σ = 5263594401. Its totient is φ = 5015662932.

The previous prime is 5138165749. The next prime is 5138165777. The reversal of 5138165761 is 1675618315.

The square root of 5138165761 is 71681.

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

It is not a de Polignac number, because 5138165761 - 2⁵ = 5138165729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5138165861) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3081450 + ... + 3083116.

Almost surely, 2^5138165761 is an apocalyptic number.

5138165761 is the 71681-st square number.

5138165761 is the 35841-st centered octagonal number.

It is an amenable number.

5138165761 is a deficient number, since it is larger than the sum of its proper divisors (125428640).

5138165761 is an frugal number, since it uses more digits than its factorization.

5138165761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420 (or 1710 counting only the distinct ones).

The product of its digits is 151200, while the sum is 43.

The cubic root of 5138165761 is about 1725.5837286258.

The spelling of 5138165761 in words is "five billion, one hundred thirty-eight million, one hundred sixty-five thousand, seven hundred sixty-one".