51436331868485 has 16 divisors (see below), whose sum is σ = 63037155889152. Its totient is φ = 40273368441600.

The previous prime is 51436331868463. The next prime is 51436331868491. The reversal of 51436331868485 is 58486813363415.

It is not a de Polignac number, because 51436331868485 - 2¹⁶ = 51436331802949 is a prime.

It is a super-2 number, since 2×51436331868485² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

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, 74537180 + ... + 75224090.

It is an arithmetic number, because the mean of its divisors is an integer number (3939822243072).

Almost surely, 2^{51436331868485} is an apocalyptic number.

It is an amenable number.

51436331868485 is a deficient number, since it is larger than the sum of its proper divisors (11600824020667).

51436331868485 is a wasteful number, since it uses less digits than its factorization.

51436331868485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005604.

The product of its digits is 199065600, while the sum is 65.

The spelling of 51436331868485 in words is "fifty-one trillion, four hundred thirty-six billion, three hundred thirty-one million, eight hundred sixty-eight thousand, four hundred eighty-five".