53961431616 has 63 divisors (see below), whose sum is σ = 154686682371.
Its totient is φ = 17985285504.
The previous prime is 53961431599. The next prime is 53961431651. The reversal of 53961431616 is 61613416935.
The square root of 53961431616 is 232296.
It is a perfect power (a square), and thus also a powerful number.
53961431616 is a `hidden beast` number, since 5 + 3 + 9 + 614 + 3 + 16 + 16 = 666.
It is a super-2 number, since 2×539614316162 (a number of 22 digits) contains 22 as substring.
It is an unprimeable number.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5570265 + ... + 5579943.
Almost surely, 253961431616 is an apocalyptic number.
53961431616 is the 232296-th square number.
It is an amenable number.
53961431616 is an abundant number, since it is smaller than the sum of its proper divisors (100725250755).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
53961431616 is an frugal number, since it uses more digits than its factorization.
53961431616 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 19376 (or 9684 counting only the distinct ones).
The product of its digits is 349920, while the sum is 45.
The spelling of 53961431616 in words is "fifty-three billion, nine hundred sixty-one million, four hundred thirty-one thousand, six hundred sixteen".