51426000644 has 12 divisors (see below), whose sum is σ = 89997271644. Its totient is φ = 25712494464.

The previous prime is 51426000631. The next prime is 51426000667. The reversal of 51426000644 is 44600062415.

It can be written as a sum of positive squares in 2 ways, for example, as 26597695744 + 24828304900 = 163088^2 + 157570^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51426000644.

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, 190592 + ... + 373064.

It is an arithmetic number, because the mean of its divisors is an integer number (7499772637).

Almost surely, 2^51426000644 is an apocalyptic number.

It is an amenable number.

51426000644 is a deficient number, since it is larger than the sum of its proper divisors (38571271000).

51426000644 is a wasteful number, since it uses less digits than its factorization.

51426000644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252934 (or 252932 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 51426000644 in words is "fifty-one billion, four hundred twenty-six million, six hundred forty-four", and thus it is an aban number.