49817151920 has 80 divisors (see below), whose sum is σ = 117258878880. Its totient is φ = 19680663552.

The previous prime is 49817151893. The next prime is 49817151949. The reversal of 49817151920 is 2915171894.

49817151920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7209107 + ... + 7216013.

It is an arithmetic number, because the mean of its divisors is an integer number (1465735986).

Almost surely, 2^49817151920 is an apocalyptic number.

49817151920 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 49817151920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58629439440).

49817151920 is an abundant number, since it is smaller than the sum of its proper divisors (67441726960).

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

49817151920 is a wasteful number, since it uses less digits than its factorization.

49817151920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8022 (or 8016 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 47.

The spelling of 49817151920 in words is "forty-nine billion, eight hundred seventeen million, one hundred fifty-one thousand, nine hundred twenty".