1696915259649 has 27 divisors (see below), whose sum is σ = 2465744446659. Its totient is φ = 1124557734960.

The previous prime is 1696915259629. The next prime is 1696915259657. The reversal of 1696915259649 is 9469525196961.

The square root of 1696915259649 is 1302657.

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

1696915259649 is a `hidden beast` number, since 1 + 6 + 9 + 6 + 9 + 1 + 525 + 96 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18698648049 + 1678216611600 = 136743^2 + 1295460^2 .

It is not a de Polignac number, because 1696915259649 - 2¹³ = 1696915251457 is a prime.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1696915259629) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 707341552 + ... + 707343950.

Almost surely, 2^{1696915259649} is an apocalyptic number.

1696915259649 is the 1302657-th square number.

1696915259649 is the 651329-th centered octagonal number.

It is an amenable number.

1696915259649 is a deficient number, since it is larger than the sum of its proper divisors (768829187010).

1696915259649 is an frugal number, since it uses more digits than its factorization.

1696915259649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5166 (or 2583 counting only the distinct ones).

The product of its digits is 283435200, while the sum is 72.

The spelling of 1696915259649 in words is "one trillion, six hundred ninety-six billion, nine hundred fifteen million, two hundred fifty-nine thousand, six hundred forty-nine".