51785407652 has 24 divisors (see below), whose sum is σ = 98875963872. Its totient is φ = 23535747200.

The previous prime is 51785407637. The next prime is 51785407691. The reversal of 51785407652 is 25670458715.

It is a self number, because there is not a number n which added to its sum of digits gives 51785407652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282743 + ... + 428385.

It is an arithmetic number, because the mean of its divisors is an integer number (4119831828).

Almost surely, 2^51785407652 is an apocalyptic number.

It is an amenable number.

51785407652 is a deficient number, since it is larger than the sum of its proper divisors (47090556220).

51785407652 is a wasteful number, since it uses less digits than its factorization.

51785407652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153739 (or 153737 counting only the distinct ones).

The product of its (nonzero) digits is 2352000, while the sum is 50.

The spelling of 51785407652 in words is "fifty-one billion, seven hundred eighty-five million, four hundred seven thousand, six hundred fifty-two".