49209519666 has 32 divisors (see below), whose sum is σ = 101326337280. Its totient is φ = 15920793216.

The previous prime is 49209519649. The next prime is 49209519713. The reversal of 49209519666 is 66691590294.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180186 + ... + 361781.

It is an arithmetic number, because the mean of its divisors is an integer number (3166448040).

Almost surely, 2^49209519666 is an apocalyptic number.

49209519666 is an abundant number, since it is smaller than the sum of its proper divisors (52116817614).

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

49209519666 is a wasteful number, since it uses less digits than its factorization.

49209519666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542418.

The product of its (nonzero) digits is 6298560, while the sum is 57.

The spelling of 49209519666 in words is "forty-nine billion, two hundred nine million, five hundred nineteen thousand, six hundred sixty-six".