7780838949 has 48 divisors (see below), whose sum is σ = 12423483072. Its totient is φ = 4662330624.

The previous prime is 7780838921. The next prime is 7780838959. The reversal of 7780838949 is 9498380877.

It is not a de Polignac number, because 7780838949 - 2⁸ = 7780838693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7780838959) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1743529 + ... + 1747985.

It is an arithmetic number, because the mean of its divisors is an integer number (258822564).

Almost surely, 2^7780838949 is an apocalyptic number.

It is an amenable number.

7780838949 is a deficient number, since it is larger than the sum of its proper divisors (4642644123).

7780838949 is a wasteful number, since it uses less digits than its factorization.

7780838949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4866 (or 4863 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 63.

The square root of 7780838949 is about 88209.0638710104. The cubic root of 7780838949 is about 1981.5672172484.

The spelling of 7780838949 in words is "seven billion, seven hundred eighty million, eight hundred thirty-eight thousand, nine hundred forty-nine".