8178440249 has 32 divisors (see below), whose sum is σ = 9977748480. Its totient is φ = 6555322368.

The previous prime is 8178440203. The next prime is 8178440267. The reversal of 8178440249 is 9420448718.

It is not a de Polignac number, because 8178440249 - 2²⁸ = 7910004793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (8178440279) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 921059 + ... + 929895.

It is an arithmetic number, because the mean of its divisors is an integer number (311804640).

Almost surely, 2^8178440249 is an apocalyptic number.

It is an amenable number.

8178440249 is a deficient number, since it is larger than the sum of its proper divisors (1799308231).

8178440249 is a wasteful number, since it uses less digits than its factorization.

8178440249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9017.

The product of its (nonzero) digits is 516096, while the sum is 47.

The square root of 8178440249 is about 90434.7292194763. The cubic root of 8178440249 is about 2014.7608119561.

The spelling of 8178440249 in words is "eight billion, one hundred seventy-eight million, four hundred forty thousand, two hundred forty-nine".