49494178440 has 640 divisors, whose sum is σ = 201309926400. Its totient is φ = 10654364160.

The previous prime is 49494178429. The next prime is 49494178451. The reversal of 49494178440 is 4487149494.

It is a happy number.

49494178440 is a `hidden beast` number, since 4 + 94 + 9 + 41 + 78 + 440 = 666.

It is an interprime number because it is at equal distance from previous prime (49494178429) and next prime (49494178451).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 142634347 + ... + 142634693.

It is an arithmetic number, because the mean of its divisors is an integer number (314546760).

Almost surely, 2^49494178440 is an apocalyptic number.

49494178440 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 49494178440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100654963200).

49494178440 is an abundant number, since it is smaller than the sum of its proper divisors (151815747960).

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

49494178440 is a wasteful number, since it uses less digits than its factorization.

49494178440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 49494178440 in words is "forty-nine billion, four hundred ninety-four million, one hundred seventy-eight thousand, four hundred forty".