49190251578 has 64 divisors (see below), whose sum is σ = 107000947200. Its totient is φ = 14985673920.

The previous prime is 49190251541. The next prime is 49190251697. The reversal of 49190251578 is 87515209194.

It is a self number, because there is not a number n which added to its sum of digits gives 49190251578.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 4103133 + ... + 4115103.

It is an arithmetic number, because the mean of its divisors is an integer number (1671889800).

Almost surely, 2^49190251578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49190251578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53500473600).

49190251578 is an abundant number, since it is smaller than the sum of its proper divisors (57810695622).

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

49190251578 is a wasteful number, since it uses less digits than its factorization.

49190251578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12507.

The product of its (nonzero) digits is 907200, while the sum is 51.

The spelling of 49190251578 in words is "forty-nine billion, one hundred ninety million, two hundred fifty-one thousand, five hundred seventy-eight".