1019835397161 has 81 divisors (see below), whose sum is σ = 1809252152253. Its totient is φ = 551873211120.

The previous prime is 1019835397159. The next prime is 1019835397171. The reversal of 1019835397161 is 1617935389101.

The square root of 1019835397161 is 1009869.

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

1019835397161 is a `hidden beast` number, since 1 + 0 + 1 + 98 + 3 + 5 + 397 + 161 = 666.

It is not a de Polignac number, because 1019835397161 - 2¹ = 1019835397159 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1019835397098 and 1019835397107.

It is not an unprimeable number, because it can be changed into a prime (1019835397121) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 402936466 + ... + 402938996.

Almost surely, 2^{1019835397161} is an apocalyptic number.

1019835397161 is the 1009869-th square number.

1019835397161 is the 504935-th centered octagonal number.

It is an amenable number.

1019835397161 is a deficient number, since it is larger than the sum of its proper divisors (789416755092).

1019835397161 is an frugal number, since it uses more digits than its factorization.

1019835397161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5120 (or 2560 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The spelling of 1019835397161 in words is "one trillion, nineteen billion, eight hundred thirty-five million, three hundred ninety-seven thousand, one hundred sixty-one".