51511203534 has 16 divisors (see below), whose sum is σ = 117739893888. Its totient is φ = 14717486712.

The previous prime is 51511203517. The next prime is 51511203577. The reversal of 51511203534 is 43530211515.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613228572 + ... + 613228655.

It is an arithmetic number, because the mean of its divisors is an integer number (7358743368).

Almost surely, 2^51511203534 is an apocalyptic number.

51511203534 is an abundant number, since it is smaller than the sum of its proper divisors (66228690354).

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

51511203534 is a wasteful number, since it uses less digits than its factorization.

51511203534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226457239.

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 51511203534 in words is "fifty-one billion, five hundred eleven million, two hundred three thousand, five hundred thirty-four".