5215571610678 has 256 divisors, whose sum is σ = 13787378841600. Its totient is φ = 1440659520000.

The previous prime is 5215571610673. The next prime is 5215571610707. The reversal of 5215571610678 is 8760161755125.

5215571610678 is a `hidden beast` number, since 5 + 2 + 1 + 5 + 571 + 6 + 1 + 0 + 67 + 8 = 666.

It is a super-2 number, since 2×5215571610678² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5215571610673) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 303381063 + ... + 303398253.

It is an arithmetic number, because the mean of its divisors is an integer number (53856948600).

Almost surely, 2^{5215571610678} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5215571610678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6893689420800).

5215571610678 is an abundant number, since it is smaller than the sum of its proper divisors (8571807230922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5215571610678 is a wasteful number, since it uses less digits than its factorization.

5215571610678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17716 (or 17710 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 54.

The spelling of 5215571610678 in words is "five trillion, two hundred fifteen billion, five hundred seventy-one million, six hundred ten thousand, six hundred seventy-eight".