49897755648 has 528 divisors, whose sum is σ = 163625716800. Its totient is φ = 15009546240.

The previous prime is 49897755647. The next prime is 49897755659. The reversal of 49897755648 is 84655779894.

49897755648 is a `hidden beast` number, since 498 + 9 + 7 + 75 + 5 + 64 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49897755641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 275678118 + ... + 275678298.

Almost surely, 2^49897755648 is an apocalyptic number.

49897755648 is a gapful number since it is divisible by the number (48) 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 49897755648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81812858400).

49897755648 is an abundant number, since it is smaller than the sum of its proper divisors (113727961152).

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

49897755648 is a wasteful number, since it uses less digits than its factorization.

49897755648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 258 counting only the distinct ones).

The product of its digits is 609638400, while the sum is 72.

The spelling of 49897755648 in words is "forty-nine billion, eight hundred ninety-seven million, seven hundred fifty-five thousand, six hundred forty-eight".