49646647019 has 4 divisors (see below), whose sum is σ = 49668414600. Its totient is φ = 49624879440.

The previous prime is 49646646967. The next prime is 49646647021. The reversal of 49646647019 is 91074664694.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 49646647019 - 2¹² = 49646642923 is a prime.

It is a super-2 number, since 2×49646647019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49646647069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10880369 + ... + 10884930.

It is an arithmetic number, because the mean of its divisors is an integer number (12417103650).

Almost surely, 2^49646647019 is an apocalyptic number.

49646647019 is a deficient number, since it is larger than the sum of its proper divisors (21767581).

49646647019 is a wasteful number, since it uses less digits than its factorization.

49646647019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21767580.

The product of its (nonzero) digits is 7838208, while the sum is 56.

The spelling of 49646647019 in words is "forty-nine billion, six hundred forty-six million, six hundred forty-seven thousand, nineteen".