51019491015 has 12 divisors (see below), whose sum is σ = 88433784504. Its totient is φ = 27210395184.

The previous prime is 51019491007. The next prime is 51019491067.

51019491015 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51019491015 - 2³ = 51019491007 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 566883189 + ... + 566883278.

It is an arithmetic number, because the mean of its divisors is an integer number (7369482042).

Almost surely, 2^51019491015 is an apocalyptic number.

51019491015 is a deficient number, since it is larger than the sum of its proper divisors (37414293489).

51019491015 is a wasteful number, since it uses less digits than its factorization.

51019491015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133766478 (or 1133766475 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 36.

The spelling of 51019491015 in words is "fifty-one billion, nineteen million, four hundred ninety-one thousand, fifteen".