51934021040 has 80 divisors (see below), whose sum is σ = 134936426016. Its totient is φ = 18424473600.

The previous prime is 51934021039. The next prime is 51934021043. The reversal of 51934021040 is 4012043915.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 51934020994 and 51934021012.

It is not an unprimeable number, because it can be changed into a prime (51934021043) 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, 683627 + ... + 755786.

Almost surely, 2^51934021040 is an apocalyptic number.

It is an amenable number.

51934021040 is an abundant number, since it is smaller than the sum of its proper divisors (83002404976).

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

51934021040 is a wasteful number, since it uses less digits than its factorization.

51934021040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439478 (or 1439472 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 51934021040 its reverse (4012043915), we get a palindrome (55946064955).

The spelling of 51934021040 in words is "fifty-one billion, nine hundred thirty-four million, twenty-one thousand, forty".