618964548049 has 9 divisors (see below), whose sum is σ = 657530181147. Its totient is φ = 582542280864.

The previous prime is 618964548031. The next prime is 618964548067. The reversal of 618964548049 is 940845469816.

The square root of 618964548049 is 786743.

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

It is an interprime number because it is at equal distance from previous prime (618964548031) and next prime (618964548067).

It can be written as a sum of positive squares in only one way, i.e., 481892814225 + 137071733824 = 694185^2 + 370232^2 .

It is not a de Polignac number, because 618964548049 - 2²⁹ = 618427677137 is a prime.

It is a super-2 number, since 2×618964548049² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618964548029) 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, 13351492 + ... + 13397770.

Almost surely, 2^618964548049 is an apocalyptic number.

618964548049 is the 786743-rd square number.

618964548049 is the 393372-nd centered octagonal number.

It is an amenable number.

618964548049 is a deficient number, since it is larger than the sum of its proper divisors (38565633098).

618964548049 is an frugal number, since it uses more digits than its factorization.

618964548049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92592 (or 46296 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 64.

Multiplying 618964548049 by its sum of digits (64), we get a square (39613731075136 = 6293944²).

The spelling of 618964548049 in words is "six hundred eighteen billion, nine hundred sixty-four million, five hundred forty-eight thousand, forty-nine".