51904052419 has 4 divisors (see below), whose sum is σ = 53693847360. Its totient is φ = 50114257480.

The previous prime is 51904052371. The next prime is 51904052437. The reversal of 51904052419 is 91425040915.

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 51904052419 - 2²³ = 51895663811 is a prime.

It is a super-2 number, since 2×51904052419² (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 (51904052119) 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, 894897427 + ... + 894897484.

It is an arithmetic number, because the mean of its divisors is an integer number (13423461840).

Almost surely, 2^51904052419 is an apocalyptic number.

51904052419 is a deficient number, since it is larger than the sum of its proper divisors (1789794941).

51904052419 is a wasteful number, since it uses less digits than its factorization.

51904052419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789794940.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 51904052419 in words is "fifty-one billion, nine hundred four million, fifty-two thousand, four hundred nineteen".