157698734769 has 9 divisors (see below), whose sum is σ = 227788782169. Its totient is φ = 105131695620.

The previous prime is 157698734761. The next prime is 157698734777. The reversal of 157698734769 is 967437896751.

It is a happy number.

The square root of 157698734769 is 397113.

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

157698734769 is a `hidden beast` number, since 1 + 5 + 76 + 9 + 87 + 3 + 476 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (157698734761) and next prime (157698734777).

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 157698734769 - 2³ = 157698734761 is a prime.

It is a super-2 number, since 2×157698734769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157698734697 and 157698734706.

It is not an unprimeable number, because it can be changed into a prime (157698734761) 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, 1125154 + ... + 1257524.

Almost surely, 2^157698734769 is an apocalyptic number.

157698734769 is the 397113-rd square number.

157698734769 is the 198557-th centered octagonal number.

It is an amenable number.

157698734769 is a deficient number, since it is larger than the sum of its proper divisors (70090047400).

157698734769 is an frugal number, since it uses more digits than its factorization.

157698734769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264748 (or 132374 counting only the distinct ones).

The product of its digits is 480090240, while the sum is 72.

The spelling of 157698734769 in words is "one hundred fifty-seven billion, six hundred ninety-eight million, seven hundred thirty-four thousand, seven hundred sixty-nine".