49186122640 has 20 divisors (see below), whose sum is σ = 114357735324. Its totient is φ = 19674449024.

The previous prime is 49186122617. The next prime is 49186122647. The reversal of 49186122640 is 4622168194.

It can be written as a sum of positive squares in 2 ways, for example, as 7302044304 + 41884078336 = 85452^2 + 204656^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (49186122647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307413187 + ... + 307413346.

Almost surely, 2^49186122640 is an apocalyptic number.

49186122640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49186122640 is an abundant number, since it is smaller than the sum of its proper divisors (65171612684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49186122640 is a wasteful number, since it uses less digits than its factorization.

49186122640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614826546 (or 614826540 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 49186122640 in words is "forty-nine billion, one hundred eighty-six million, one hundred twenty-two thousand, six hundred forty".