51910046540 has 48 divisors (see below), whose sum is σ = 119585652480. Its totient is φ = 18770911680.

The previous prime is 51910046537. The next prime is 51910046549. The reversal of 51910046540 is 4564001915.

It is a self number, because there is not a number n which added to its sum of digits gives 51910046540.

It is not an unprimeable number, because it can be changed into a prime (51910046549) 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, 619712 + ... + 698471.

It is an arithmetic number, because the mean of its divisors is an integer number (2491367760).

Almost surely, 2^51910046540 is an apocalyptic number.

It is an amenable number.

51910046540 is an abundant number, since it is smaller than the sum of its proper divisors (67675605940).

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

51910046540 is a wasteful number, since it uses less digits than its factorization.

51910046540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318382 (or 1318380 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 51910046540 in words is "fifty-one billion, nine hundred ten million, forty-six thousand, five hundred forty".