78325445546 has 16 divisors (see below), whose sum is σ = 118691049120. Its totient is φ = 38763465840.

The previous prime is 78325445531. The next prime is 78325445573. The reversal of 78325445546 is 64554452387.

It is a super-2 number, since 2×78325445546² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333581 + ... + 517616.

It is an arithmetic number, because the mean of its divisors is an integer number (7418190570).

Almost surely, 2^78325445546 is an apocalyptic number.

78325445546 is a deficient number, since it is larger than the sum of its proper divisors (40365603574).

78325445546 is a wasteful number, since it uses less digits than its factorization.

78325445546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851669.

The product of its digits is 16128000, while the sum is 53.

The spelling of 78325445546 in words is "seventy-eight billion, three hundred twenty-five million, four hundred forty-five thousand, five hundred forty-six".