50402912649 has 24 divisors (see below), whose sum is σ = 67890965856. Its totient is φ = 33260544000.

The previous prime is 50402912641. The next prime is 50402912669. The reversal of 50402912649 is 94621920405.

It is not a de Polignac number, because 50402912649 - 2³ = 50402912641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50402912649.

It is not an unprimeable number, because it can be changed into a prime (50402912641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78631369 + ... + 78632009.

It is an arithmetic number, because the mean of its divisors is an integer number (2828790244).

Almost surely, 2^50402912649 is an apocalyptic number.

It is an amenable number.

50402912649 is a deficient number, since it is larger than the sum of its proper divisors (17488053207).

50402912649 is an equidigital number, since it uses as much as digits as its factorization.

50402912649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609 (or 1208 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 50402912649 in words is "fifty billion, four hundred two million, nine hundred twelve thousand, six hundred forty-nine".