51011006081 has 8 divisors (see below), whose sum is σ = 59654067264. Its totient is φ = 42706888560.

The previous prime is 51011006077. The next prime is 51011006087. The reversal of 51011006081 is 18060011015.

It is a happy number.

51011006081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51011006081 - 2² = 51011006077 is a prime.

It is a super-2 number, since 2×51011006081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51011006087) 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, 84735590 + ... + 84736191.

It is an arithmetic number, because the mean of its divisors is an integer number (7456758408).

Almost surely, 2^51011006081 is an apocalyptic number.

It is an amenable number.

51011006081 is a deficient number, since it is larger than the sum of its proper divisors (8643061183).

51011006081 is a wasteful number, since it uses less digits than its factorization.

51011006081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169471831.

The product of its (nonzero) digits is 240, while the sum is 23.

Adding to 51011006081 its reverse (18060011015), we get a palindrome (69071017096).

The spelling of 51011006081 in words is "fifty-one billion, eleven million, six thousand, eighty-one".