8189961265 has 16 divisors (see below), whose sum is σ = 10062973440. Its totient is φ = 6396009280.

The previous prime is 8189961251. The next prime is 8189961287. The reversal of 8189961265 is 5621699818.

It is not a de Polignac number, because 8189961265 - 2²⁵ = 8156406833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46620 + ... + 136210.

It is an arithmetic number, because the mean of its divisors is an integer number (628935840).

Almost surely, 2^8189961265 is an apocalyptic number.

It is an amenable number.

8189961265 is a deficient number, since it is larger than the sum of its proper divisors (1873012175).

8189961265 is a wasteful number, since it uses less digits than its factorization.

8189961265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90032.

The product of its digits is 1866240, while the sum is 55.

The square root of 8189961265 is about 90498.4047649460. The cubic root of 8189961265 is about 2015.7064364557.

The spelling of 8189961265 in words is "eight billion, one hundred eighty-nine million, nine hundred sixty-one thousand, two hundred sixty-five".