51294339620 has 12 divisors (see below), whose sum is σ = 107718113244. Its totient is φ = 20517735840.

The previous prime is 51294339619. The next prime is 51294339641. The reversal of 51294339620 is 2693349215.

It can be written as a sum of positive squares in 2 ways, for example, as 5683048996 + 45611290624 = 75386^2 + 213568^2 .

It is a super-2 number, since 2×51294339620² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282358471 + ... + 1282358510.

It is an arithmetic number, because the mean of its divisors is an integer number (8976509437).

Almost surely, 2^51294339620 is an apocalyptic number.

It is an amenable number.

51294339620 is an abundant number, since it is smaller than the sum of its proper divisors (56423773624).

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

51294339620 is a wasteful number, since it uses less digits than its factorization.

51294339620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564716990 (or 2564716988 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 44.

The spelling of 51294339620 in words is "fifty-one billion, two hundred ninety-four million, three hundred thirty-nine thousand, six hundred twenty".