8155354249 has 45 divisors (see below), whose sum is σ = 10145689767. Its totient is φ = 6554120832.

The previous prime is 8155354247. The next prime is 8155354261. The reversal of 8155354249 is 9424535518.

The square root of 8155354249 is 90307.

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., 3662065225 + 4493289024 = 60515^2 + 67032^2 .

It is not a de Polignac number, because 8155354249 - 2¹ = 8155354247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8155354199 and 8155354208.

It is not an unprimeable number, because it can be changed into a prime (8155354247) 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, 84075769 + ... + 84075865.

Almost surely, 2^8155354249 is an apocalyptic number.

8155354249 is the 90307-th square number.

8155354249 is the 45154-th centered octagonal number.

It is an amenable number.

8155354249 is a deficient number, since it is larger than the sum of its proper divisors (1990335518).

8155354249 is an frugal number, since it uses more digits than its factorization.

8155354249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 123 counting only the distinct ones).

The product of its digits is 864000, while the sum is 46.

The cubic root of 8155354249 is about 2012.8632780877.

It can be divided in two parts, 8155 and 354249, that added together give a square (362404 = 602²).

The spelling of 8155354249 in words is "eight billion, one hundred fifty-five million, three hundred fifty-four thousand, two hundred forty-nine".