979519945849 has 9 divisors (see below), whose sum is σ = 983601552271. Its totient is φ = 975455219200.

The previous prime is 979519945841. The next prime is 979519945883. The reversal of 979519945849 is 948549915979.

The square root of 979519945849 is 989707.

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

It can be written as a sum of positive squares in only one way, i.e., 964333820025 + 15186125824 = 982005^2 + 123232^2 .

It is not a de Polignac number, because 979519945849 - 2³ = 979519945841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (979519945841) 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, 254352774 + ... + 254356624.

Almost surely, 2^979519945849 is an apocalyptic number.

979519945849 is the 989707-th square number.

979519945849 is the 494854-th centered octagonal number.

It is an amenable number.

979519945849 is a deficient number, since it is larger than the sum of its proper divisors (4081606422).

979519945849 is an frugal number, since it uses more digits than its factorization.

979519945849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8216 (or 4108 counting only the distinct ones).

The product of its digits is 1322697600, while the sum is 79.

The spelling of 979519945849 in words is "nine hundred seventy-nine billion, five hundred nineteen million, nine hundred forty-five thousand, eight hundred forty-nine".