5321878309968 has 160 divisors (see below), whose sum is σ = 15149715689472. Its totient is φ = 1596391718400.

The previous prime is 5321878309963. The next prime is 5321878309973. The reversal of 5321878309968 is 8699038781235.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (5321878309963) and next prime (5321878309973).

It is a super-2 number, since 2×5321878309968² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5321878309963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145241346 + ... + 145277982.

Almost surely, 2^{5321878309968} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5321878309968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7574857844736).

5321878309968 is an abundant number, since it is smaller than the sum of its proper divisors (9827837379504).

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

5321878309968 is a wasteful number, since it uses less digits than its factorization.

5321878309968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39433 (or 39427 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 69.

The spelling of 5321878309968 in words is "five trillion, three hundred twenty-one billion, eight hundred seventy-eight million, three hundred nine thousand, nine hundred sixty-eight".