51857570680648 has 64 divisors (see below), whose sum is σ = 98509133949120. Its totient is φ = 25590482534400.

The previous prime is 51857570680627. The next prime is 51857570680667. The reversal of 51857570680648 is 84608607575815.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 699502543 + ... + 699576673.

It is an arithmetic number, because the mean of its divisors is an integer number (1539205217955).

Almost surely, 2^{51857570680648} is an apocalyptic number.

It is an amenable number.

51857570680648 is a deficient number, since it is larger than the sum of its proper divisors (46651563268472).

51857570680648 is a wasteful number, since it uses less digits than its factorization.

51857570680648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77518 (or 77514 counting only the distinct ones).

The product of its (nonzero) digits is 451584000, while the sum is 70.

The spelling of 51857570680648 in words is "fifty-one trillion, eight hundred fifty-seven billion, five hundred seventy million, six hundred eighty thousand, six hundred forty-eight".