49491072368640 has 3840 divisors, whose sum is σ = 224512563609600. Its totient is φ = 10216365096960.

The previous prime is 49491072368567. The next prime is 49491072368669. The reversal of 49491072368640 is 4686327019494.

It is a happy number.

49491072368640 is a `hidden beast` number, since 4 + 9 + 491 + 0 + 7 + 23 + 6 + 86 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (3840).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 738672721887 + ... + 738672721953.

It is an arithmetic number, because the mean of its divisors is an integer number (58466813440).

Almost surely, 2^{49491072368640} is an apocalyptic number.

49491072368640 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 49491072368640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112256281804800).

49491072368640 is an abundant number, since it is smaller than the sum of its proper divisors (175021491240960).

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

49491072368640 is an frugal number, since it uses more digits than its factorization.

49491072368640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 49491072368640 in words is "forty-nine trillion, four hundred ninety-one billion, seventy-two million, three hundred sixty-eight thousand, six hundred forty".