51498198815 has 16 divisors (see below), whose sum is σ = 70766535168. Its totient is φ = 35242833696.

The previous prime is 51498198781. The next prime is 51498198827. The reversal of 51498198815 is 51889189415.

It is not a de Polignac number, because 51498198815 - 2⁸ = 51498198559 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1444997 + ... + 1480206.

It is an arithmetic number, because the mean of its divisors is an integer number (4422908448).

Almost surely, 2^51498198815 is an apocalyptic number.

51498198815 is a deficient number, since it is larger than the sum of its proper divisors (19268336353).

51498198815 is a wasteful number, since it uses less digits than its factorization.

51498198815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925718.

The product of its digits is 4147200, while the sum is 59.

The spelling of 51498198815 in words is "fifty-one billion, four hundred ninety-eight million, one hundred ninety-eight thousand, eight hundred fifteen".