1493178909849 has 45 divisors (see below), whose sum is σ = 2451961553349. Its totient is φ = 904883597640.

The previous prime is 1493178909839. The next prime is 1493178909851. The reversal of 1493178909849 is 9489098713941.

The square root of 1493178909849 is 1221957.

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

1493178909849 is a `hidden beast` number, since 1 + 493 + 1 + 7 + 8 + 9 + 0 + 98 + 49 = 666.

It is not a de Polignac number, because 1493178909849 - 2¹³ = 1493178901657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1493178909839) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 120967572 + ... + 120979914.

Almost surely, 2^{1493178909849} is an apocalyptic number.

1493178909849 is the 1221957-th square number.

1493178909849 is the 610979-th centered octagonal number.

It is an amenable number.

1493178909849 is a deficient number, since it is larger than the sum of its proper divisors (958782643500).

1493178909849 is an frugal number, since it uses more digits than its factorization.

1493178909849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24720 (or 12357 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 72.

The spelling of 1493178909849 in words is "one trillion, four hundred ninety-three billion, one hundred seventy-eight million, nine hundred nine thousand, eight hundred forty-nine".