51004142985 has 32 divisors (see below), whose sum is σ = 89194355712. Its totient is φ = 24776202240.

The previous prime is 51004142971. The next prime is 51004143011. The reversal of 51004142985 is 58924140015.

It is not a de Polignac number, because 51004142985 - 2⁹ = 51004142473 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3218164 + ... + 3233973.

It is an arithmetic number, because the mean of its divisors is an integer number (2787323616).

Almost surely, 2^51004142985 is an apocalyptic number.

It is an amenable number.

51004142985 is a deficient number, since it is larger than the sum of its proper divisors (38190212727).

51004142985 is a wasteful number, since it uses less digits than its factorization.

51004142985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6452193.

The product of its (nonzero) digits is 57600, while the sum is 39.

The spelling of 51004142985 in words is "fifty-one billion, four million, one hundred forty-two thousand, nine hundred eighty-five".