49697288640 has 896 divisors, whose sum is σ = 198458449920. Its totient is φ = 11639586816.

The previous prime is 49697288639. The next prime is 49697288651. The reversal of 49697288640 is 4688279694.

49697288640 is a `hidden beast` number, since 496 + 9 + 7 + 2 + 88 + 64 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 158777124 + ... + 158777436.

Almost surely, 2^49697288640 is an apocalyptic number.

49697288640 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 49697288640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99229224960).

49697288640 is an abundant number, since it is smaller than the sum of its proper divisors (148761161280).

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

49697288640 is a wasteful number, since it uses less digits than its factorization.

49697288640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 63.

The spelling of 49697288640 in words is "forty-nine billion, six hundred ninety-seven million, two hundred eighty-eight thousand, six hundred forty".