49919395890 has 128 divisors (see below), whose sum is σ = 147538524672. Its totient is φ = 10526423040.

The previous prime is 49919395871. The next prime is 49919395919. The reversal of 49919395890 is 9859391994.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6059214 + ... + 6067446.

It is an arithmetic number, because the mean of its divisors is an integer number (1152644724).

Almost surely, 2^49919395890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49919395890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73769262336).

49919395890 is an abundant number, since it is smaller than the sum of its proper divisors (97619128782).

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

49919395890 is a wasteful number, since it uses less digits than its factorization.

49919395890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10484.

The product of its (nonzero) digits is 28343520, while the sum is 66.

The spelling of 49919395890 in words is "forty-nine billion, nine hundred nineteen million, three hundred ninety-five thousand, eight hundred ninety".