49830000781 has 16 divisors (see below), whose sum is σ = 56365113600. Its totient is φ = 43636331200.

The previous prime is 49830000769. The next prime is 49830000809. The reversal of 49830000781 is 18700003894.

49830000781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-49830000781 is a prime.

It is a super-2 number, since 2×49830000781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49830000281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43726 + ... + 318703.

It is an arithmetic number, because the mean of its divisors is an integer number (3522819600).

Almost surely, 2^49830000781 is an apocalyptic number.

49830000781 is the 119320-th centered heptagonal number.

It is an amenable number.

49830000781 is a deficient number, since it is larger than the sum of its proper divisors (6535112819).

49830000781 is a wasteful number, since it uses less digits than its factorization.

49830000781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362900.

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 49830000781 in words is "forty-nine billion, eight hundred thirty million, seven hundred eighty-one", and thus it is an aban number.