49878999987894 has 128 divisors (see below), whose sum is σ = 138211632783360. Its totient is φ = 12953828253600.

The previous prime is 49878999987853. The next prime is 49878999987917.

49878999987894 is a `hidden beast` number, since 498 + 7 + 8 + 9 + 9 + 9 + 9 + 8 + 7 + 8 + 94 = 666.

49878999987894 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30005607 + ... + 31624269.

It is an arithmetic number, because the mean of its divisors is an integer number (1079778381120).

Almost surely, 2^{49878999987894} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49878999987894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69105816391680).

49878999987894 is an abundant number, since it is smaller than the sum of its proper divisors (88332632795466).

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

49878999987894 is a wasteful number, since it uses less digits than its factorization.

49878999987894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626103 (or 1626097 counting only the distinct ones).

The product of its digits is 1706597351424, while the sum is 108.

The spelling of 49878999987894 in words is "forty-nine trillion, eight hundred seventy-eight billion, nine hundred ninety-nine million, nine hundred eighty-seven thousand, eight hundred ninety-four".