2049648940778 has 16 divisors (see below), whose sum is σ = 3180524244480. Its totient is φ = 989474959536.

The previous prime is 2049648940771. The next prime is 2049648940793. The reversal of 2049648940778 is 8770498469402.

It is not an unprimeable number, because it can be changed into a prime (2049648940771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8822375 + ... + 9051717.

It is an arithmetic number, because the mean of its divisors is an integer number (198782765280).

Almost surely, 2^{2049648940778} is an apocalyptic number.

2049648940778 is a deficient number, since it is larger than the sum of its proper divisors (1130875303702).

2049648940778 is a wasteful number, since it uses less digits than its factorization.

2049648940778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383461.

The product of its (nonzero) digits is 195084288, while the sum is 68.

The spelling of 2049648940778 in words is "two trillion, forty-nine billion, six hundred forty-eight million, nine hundred forty thousand, seven hundred seventy-eight".