51438852356620 has 12 divisors (see below), whose sum is σ = 108021589948944. Its totient is φ = 20575540942640.

The previous prime is 51438852356609. The next prime is 51438852356621. The reversal of 51438852356620 is 2665325883415.

It is not an unprimeable number, because it can be changed into a prime (51438852356621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285971308896 + ... + 1285971308935.

It is an arithmetic number, because the mean of its divisors is an integer number (9001799162412).

Almost surely, 2^{51438852356620} is an apocalyptic number.

It is an amenable number.

51438852356620 is an abundant number, since it is smaller than the sum of its proper divisors (56582737592324).

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

51438852356620 is a wasteful number, since it uses less digits than its factorization.

51438852356620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571942617840 (or 2571942617838 counting only the distinct ones).

The product of its (nonzero) digits is 41472000, while the sum is 58.

The spelling of 51438852356620 in words is "fifty-one trillion, four hundred thirty-eight billion, eight hundred fifty-two million, three hundred fifty-six thousand, six hundred twenty".