49906280891 has 4 divisors (see below), whose sum is σ = 49917697632. Its totient is φ = 49894864152.

The previous prime is 49906280867. The next prime is 49906280903. The reversal of 49906280891 is 19808260994.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49906280891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49906580891) 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, 5701811 + ... + 5710556.

It is an arithmetic number, because the mean of its divisors is an integer number (12479424408).

Almost surely, 2^49906280891 is an apocalyptic number.

49906280891 is a deficient number, since it is larger than the sum of its proper divisors (11416741).

49906280891 is a wasteful number, since it uses less digits than its factorization.

49906280891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11416740.

The product of its (nonzero) digits is 2239488, while the sum is 56.

The spelling of 49906280891 in words is "forty-nine billion, nine hundred six million, two hundred eighty thousand, eight hundred ninety-one".