51340025566 has 16 divisors (see below), whose sum is σ = 77496051600. Its totient is φ = 25508063808.

The previous prime is 51340025563. The next prime is 51340025579. The reversal of 51340025566 is 66552004315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51340025563) 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, 2627280 + ... + 2646748.

It is an arithmetic number, because the mean of its divisors is an integer number (4843503225).

Almost surely, 2^51340025566 is an apocalyptic number.

51340025566 is a deficient number, since it is larger than the sum of its proper divisors (26156026034).

51340025566 is a wasteful number, since it uses less digits than its factorization.

51340025566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27723.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 51340025566 in words is "fifty-one billion, three hundred forty million, twenty-five thousand, five hundred sixty-six".