49551785643 has 4 divisors (see below), whose sum is σ = 66069047528. Its totient is φ = 33034523760.

The previous prime is 49551785641. The next prime is 49551785659. The reversal of 49551785643 is 34658715594.

49551785643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 49551785643 - 2¹ = 49551785641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49551785641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8258630938 + ... + 8258630943.

It is an arithmetic number, because the mean of its divisors is an integer number (16517261882).

Almost surely, 2^49551785643 is an apocalyptic number.

49551785643 is a deficient number, since it is larger than the sum of its proper divisors (16517261885).

49551785643 is a wasteful number, since it uses less digits than its factorization.

49551785643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16517261884.

The product of its digits is 18144000, while the sum is 57.

The spelling of 49551785643 in words is "forty-nine billion, five hundred fifty-one million, seven hundred eighty-five thousand, six hundred forty-three".