2499156378 has 24 divisors (see below), whose sum is σ = 5415778368. Its totient is φ = 832907592.

The previous prime is 2499156337. The next prime is 2499156409. The reversal of 2499156378 is 8736519942.

2499156378 is a `hidden beast` number, since 2 + 4 + 9 + 9 + 1 + 563 + 78 = 666.

2499156378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164575 + ... + 179117.

It is an arithmetic number, because the mean of its divisors is an integer number (225657432).

Almost surely, 2^2499156378 is an apocalyptic number.

2499156378 is an abundant number, since it is smaller than the sum of its proper divisors (2916621990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2499156378 is a wasteful number, since it uses less digits than its factorization.

2499156378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24098 (or 24095 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 2499156378 is about 49991.5630681818. The cubic root of 2499156378 is about 1357.0561282944.

The spelling of 2499156378 in words is "two billion, four hundred ninety-nine million, one hundred fifty-six thousand, three hundred seventy-eight".