73856403852 has 144 divisors (see below), whose sum is σ = 221461470720. Its totient is φ = 18940521600.

The previous prime is 73856403827. The next prime is 73856403857. The reversal of 73856403852 is 25830465837.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 73856403795 and 73856403804.

It is not an unprimeable number, because it can be changed into a prime (73856403857) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 438702 + ... + 583242.

It is an arithmetic number, because the mean of its divisors is an integer number (1537926880).

Almost surely, 2^73856403852 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 73856403852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110730735360).

73856403852 is an abundant number, since it is smaller than the sum of its proper divisors (147605066868).

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

73856403852 is a wasteful number, since it uses less digits than its factorization.

73856403852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144652 (or 144643 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 73856403852 in words is "seventy-three billion, eight hundred fifty-six million, four hundred three thousand, eight hundred fifty-two".