49651665840 has 960 divisors, whose sum is σ = 210898501632. Its totient is φ = 10218700800.

The previous prime is 49651665839. The next prime is 49651665841. The reversal of 49651665840 is 4856615694.

49651665840 is a `hidden beast` number, since 4 + 9 + 6 + 51 + 6 + 6 + 584 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (49651665839) and next prime (49651665841).

It is not an unprimeable number, because it can be changed into a prime (49651665841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 147334152 + ... + 147334488.

Almost surely, 2^49651665840 is an apocalyptic number.

49651665840 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 49651665840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105449250816).

49651665840 is an abundant number, since it is smaller than the sum of its proper divisors (161246835792).

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

49651665840 is a wasteful number, since it uses less digits than its factorization.

49651665840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 49651665840 in words is "forty-nine billion, six hundred fifty-one million, six hundred sixty-five thousand, eight hundred forty".