49191693408 has 432 divisors, whose sum is σ = 174623235696. Its totient is φ = 12947374080.

The previous prime is 49191693373. The next prime is 49191693409. The reversal of 49191693408 is 80439619194.

It is a happy number.

49191693408 is a `hidden beast` number, since 4 + 91 + 91 + 69 + 3 + 408 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49191693409) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11900110 + ... + 11904242.

It is an arithmetic number, because the mean of its divisors is an integer number (404220453).

Almost surely, 2^49191693408 is an apocalyptic number.

49191693408 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 49191693408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87311617848).

49191693408 is an abundant number, since it is smaller than the sum of its proper divisors (125431542288).

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

49191693408 is a wasteful number, since it uses less digits than its factorization.

49191693408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4207 (or 4179 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 49191693408 in words is "forty-nine billion, one hundred ninety-one million, six hundred ninety-three thousand, four hundred eight".