49781942891 has 8 divisors (see below), whose sum is σ = 50859569664. Its totient is φ = 48714157800.

The previous prime is 49781942887. The next prime is 49781942893. The reversal of 49781942891 is 19824918794.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 49781942891 - 2² = 49781942887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49781942893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2450195 + ... + 2470428.

It is an arithmetic number, because the mean of its divisors is an integer number (6357446208).

Almost surely, 2^49781942891 is an apocalyptic number.

49781942891 is a deficient number, since it is larger than the sum of its proper divisors (1077626773).

49781942891 is a wasteful number, since it uses less digits than its factorization.

49781942891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4920841.

The product of its digits is 10450944, while the sum is 62.

The spelling of 49781942891 in words is "forty-nine billion, seven hundred eighty-one million, nine hundred forty-two thousand, eight hundred ninety-one".