49787951837 has 4 divisors (see below), whose sum is σ = 53617794300. Its totient is φ = 45958109376.

The previous prime is 49787951813. The next prime is 49787951879. The reversal of 49787951837 is 73815978794.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11080930756 + 38707021081 = 105266^2 + 196741^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49787951837 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 (49787951897) 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, 1914921212 + ... + 1914921237.

It is an arithmetic number, because the mean of its divisors is an integer number (13404448575).

Almost surely, 2^49787951837 is an apocalyptic number.

It is an amenable number.

49787951837 is a deficient number, since it is larger than the sum of its proper divisors (3829842463).

49787951837 is a wasteful number, since it uses less digits than its factorization.

49787951837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829842462.

The product of its digits is 106686720, while the sum is 68.

The spelling of 49787951837 in words is "forty-nine billion, seven hundred eighty-seven million, nine hundred fifty-one thousand, eight hundred thirty-seven".