51781350485 has 8 divisors (see below), whose sum is σ = 62718346656. Its totient is φ = 41037929680.

The previous prime is 51781350473. The next prime is 51781350487. The reversal of 51781350485 is 58405318715.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51781350485 - 2²⁴ = 51764573269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51781350487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48393251 + ... + 48394320.

It is an arithmetic number, because the mean of its divisors is an integer number (7839793332).

Almost surely, 2^51781350485 is an apocalyptic number.

It is an amenable number.

51781350485 is a deficient number, since it is larger than the sum of its proper divisors (10936996171).

51781350485 is a wasteful number, since it uses less digits than its factorization.

51781350485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96787683.

The product of its (nonzero) digits is 672000, while the sum is 47.

The spelling of 51781350485 in words is "fifty-one billion, seven hundred eighty-one million, three hundred fifty thousand, four hundred eighty-five".