51068340240 has 40 divisors (see below), whose sum is σ = 158311855488. Its totient is φ = 13618224000.

The previous prime is 51068340227. The next prime is 51068340241. The reversal of 51068340240 is 4204386015.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (51068340241) 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, 106392136 + ... + 106392615.

Almost surely, 2^51068340240 is an apocalyptic number.

It is an amenable number.

51068340240 is an abundant number, since it is smaller than the sum of its proper divisors (107243515248).

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

51068340240 is a wasteful number, since it uses less digits than its factorization.

51068340240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212784767 (or 212784761 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The spelling of 51068340240 in words is "fifty-one billion, sixty-eight million, three hundred forty thousand, two hundred forty".