51011000555 has 8 divisors (see below), whose sum is σ = 61222874112. Its totient is φ = 40802351488.

The previous prime is 51011000543. The next prime is 51011000563. The reversal of 51011000555 is 55500011015.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51011000555 - 2¹² = 51010996459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51011000555.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 771179 + ... + 834708.

It is an arithmetic number, because the mean of its divisors is an integer number (7652859264).

Almost surely, 2^51011000555 is an apocalyptic number.

51011000555 is a deficient number, since it is larger than the sum of its proper divisors (10211873557).

51011000555 is a wasteful number, since it uses less digits than its factorization.

51011000555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612245.

The product of its (nonzero) digits is 625, while the sum is 23.

The spelling of 51011000555 in words is "fifty-one billion, eleven million, five hundred fifty-five", and thus it is an aban number.