49809254656 has 72 divisors (see below), whose sum is σ = 113713770240. Its totient is φ = 21330591744.

The previous prime is 49809254653. The next prime is 49809254657. The reversal of 49809254656 is 65645290894.

It is a self number, because there is not a number n which added to its sum of digits gives 49809254656.

It is not an unprimeable number, because it can be changed into a prime (49809254653) 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, 2515065 + ... + 2534791.

It is an arithmetic number, because the mean of its divisors is an integer number (1579357920).

Almost surely, 2^49809254656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49809254656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56856885120).

49809254656 is an abundant number, since it is smaller than the sum of its proper divisors (63904515584).

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

49809254656 is a wasteful number, since it uses less digits than its factorization.

49809254656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21159 (or 21145 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 58.

The spelling of 49809254656 in words is "forty-nine billion, eight hundred nine million, two hundred fifty-four thousand, six hundred fifty-six".