2049517517478 has 16 divisors (see below), whose sum is σ = 4168510205760. Its totient is φ = 671593310696.

The previous prime is 2049517517401. The next prime is 2049517517479. The reversal of 2049517517478 is 8747157159402.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2049517517479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2894798400 + ... + 2894799107.

It is an arithmetic number, because the mean of its divisors is an integer number (260531887860).

Almost surely, 2^{2049517517478} is an apocalyptic number.

2049517517478 is an abundant number, since it is smaller than the sum of its proper divisors (2118992688282).

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

2049517517478 is a wasteful number, since it uses less digits than its factorization.

2049517517478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5789597571.

The product of its (nonzero) digits is 19756800, while the sum is 60.

The spelling of 2049517517478 in words is "two trillion, forty-nine billion, five hundred seventeen million, five hundred seventeen thousand, four hundred seventy-eight".