49451273280 has 448 divisors, whose sum is σ = 188337139200. Its totient is φ = 12177285120.

The previous prime is 49451273279. The next prime is 49451273317. The reversal of 49451273280 is 8237215494.

49451273280 is a `hidden beast` number, since 49 + 4 + 512 + 73 + 28 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 63 ways as a sum of consecutive naturals, for example, 5758590 + ... + 5767170.

It is an arithmetic number, because the mean of its divisors is an integer number (420395400).

Almost surely, 2^49451273280 is an apocalyptic number.

49451273280 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 49451273280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94168569600).

49451273280 is an abundant number, since it is smaller than the sum of its proper divisors (138885865920).

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

49451273280 is a wasteful number, since it uses less digits than its factorization.

49451273280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8659 (or 8643 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 49451273280 in words is "forty-nine billion, four hundred fifty-one million, two hundred seventy-three thousand, two hundred eighty".