49426206640 has 80 divisors (see below), whose sum is σ = 121820542272. Its totient is φ = 18585362432.

The previous prime is 49426206631. The next prime is 49426206673. The reversal of 49426206640 is 4660262494.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1144317 + ... + 1186723.

Almost surely, 2^49426206640 is an apocalyptic number.

49426206640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49426206640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60910271136).

49426206640 is an abundant number, since it is smaller than the sum of its proper divisors (72394335632).

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

49426206640 is a wasteful number, since it uses less digits than its factorization.

49426206640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43294 (or 43288 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 49426206640 in words is "forty-nine billion, four hundred twenty-six million, two hundred six thousand, six hundred forty".