49859181551 has 4 divisors (see below), whose sum is σ = 50542184112. Its totient is φ = 49176178992.

The previous prime is 49859181497. The next prime is 49859181571. The reversal of 49859181551 is 15518195894.

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-49859181551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49859181571) 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, 341501171 + ... + 341501316.

It is an arithmetic number, because the mean of its divisors is an integer number (12635546028).

Almost surely, 2^49859181551 is an apocalyptic number.

49859181551 is a deficient number, since it is larger than the sum of its proper divisors (683002561).

49859181551 is an equidigital number, since it uses as much as digits as its factorization.

49859181551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683002560.

The product of its digits is 2592000, while the sum is 56.

The spelling of 49859181551 in words is "forty-nine billion, eight hundred fifty-nine million, one hundred eighty-one thousand, five hundred fifty-one".