51994835994 has 16 divisors (see below), whose sum is σ = 107344177920. Its totient is φ = 16772527680.

The previous prime is 51994835993. The next prime is 51994836037. The reversal of 51994835994 is 49953849915.

It is not an unprimeable number, because it can be changed into a prime (51994835993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139770879 + ... + 139771250.

It is an arithmetic number, because the mean of its divisors is an integer number (6709011120).

Almost surely, 2^51994835994 is an apocalyptic number.

51994835994 is an abundant number, since it is smaller than the sum of its proper divisors (55349341926).

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

51994835994 is a wasteful number, since it uses less digits than its factorization.

51994835994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279542165.

The product of its digits is 62985600, while the sum is 66.

The spelling of 51994835994 in words is "fifty-one billion, nine hundred ninety-four million, eight hundred thirty-five thousand, nine hundred ninety-four".