51523453216 has 24 divisors (see below), whose sum is σ = 101511415404. Its totient is φ = 25742776320.

The previous prime is 51523453207. The next prime is 51523453253. The reversal of 51523453216 is 61235432515.

It can be written as a sum of positive squares in 2 ways, for example, as 51255148816 + 268304400 = 226396^2 + 16380^2 .

It is a super-3 number, since 3×51523453216³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547965 + ... + 635068.

Almost surely, 2^51523453216 is an apocalyptic number.

It is an amenable number.

51523453216 is a deficient number, since it is larger than the sum of its proper divisors (49987962188).

51523453216 is a wasteful number, since it uses less digits than its factorization.

51523453216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184404 (or 1184396 counting only the distinct ones).

The product of its digits is 108000, while the sum is 37.

The spelling of 51523453216 in words is "fifty-one billion, five hundred twenty-three million, four hundred fifty-three thousand, two hundred sixteen".