49991593745 has 16 divisors (see below), whose sum is σ = 63568609488. Its totient is φ = 37611171840.

The previous prime is 49991593727. The next prime is 49991593753. The reversal of 49991593745 is 54739519994.

It is a Cunningham number, because it is equal to 223588²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 15649936 + 49975943809 = 3956^2 + 223553^2 .

It is not a de Polignac number, because 49991593745 - 2⁶ = 49991593681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121736 + ... + 338825.

It is an arithmetic number, because the mean of its divisors is an integer number (3973038093).

Almost surely, 2^49991593745 is an apocalyptic number.

It is an amenable number.

49991593745 is a deficient number, since it is larger than the sum of its proper divisors (13577015743).

49991593745 is a wasteful number, since it uses less digits than its factorization.

49991593745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461860.

The product of its digits is 55112400, while the sum is 65.

The spelling of 49991593745 in words is "forty-nine billion, nine hundred ninety-one million, five hundred ninety-three thousand, seven hundred forty-five".