5157946729 has 4 divisors (see below), whose sum is σ = 5554711876. Its totient is φ = 4761181584.

The previous prime is 5157946723. The next prime is 5157946747. The reversal of 5157946729 is 9276497515.

It is a happy number.

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 3074480704 + 2083466025 = 55448^2 + 45645^2 .

It is a cyclic number.

It is not a de Polignac number, because 5157946729 - 2³ = 5157946721 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 5157946729.

It is not an unprimeable number, because it can be changed into a prime (5157946721) 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, 198382554 + ... + 198382579.

It is an arithmetic number, because the mean of its divisors is an integer number (1388677969).

Almost surely, 2^5157946729 is an apocalyptic number.

It is an amenable number.

5157946729 is a deficient number, since it is larger than the sum of its proper divisors (396765147).

5157946729 is a wasteful number, since it uses less digits than its factorization.

5157946729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396765146.

The product of its digits is 4762800, while the sum is 55.

The square root of 5157946729 is about 71818.8466142419. The cubic root of 5157946729 is about 1727.7952835373.

The spelling of 5157946729 in words is "five billion, one hundred fifty-seven million, nine hundred forty-six thousand, seven hundred twenty-nine".