78186774740032 has 112 divisors (see below), whose sum is σ = 183049459826688. Its totient is φ = 32425366786560.

The previous prime is 78186774739967. The next prime is 78186774740083. The reversal of 78186774740032 is 23004747768187.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×78186774740032² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200445093 + ... + 200834779.

It is an arithmetic number, because the mean of its divisors is an integer number (1634370177024).

Almost surely, 2^{78186774740032} 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 78186774740032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91524729913344).

78186774740032 is an abundant number, since it is smaller than the sum of its proper divisors (104862685086656).

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

78186774740032 is a wasteful number, since it uses less digits than its factorization.

78186774740032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404184 (or 404174 counting only the distinct ones).

The product of its (nonzero) digits is 88510464, while the sum is 64.

The spelling of 78186774740032 in words is "seventy-eight trillion, one hundred eighty-six billion, seven hundred seventy-four million, seven hundred forty thousand, thirty-two".