102171456378 has 64 divisors (see below), whose sum is σ = 234174896640. Its totient is φ = 33002424000.

The previous prime is 102171456377. The next prime is 102171456389. The reversal of 102171456378 is 873654171201.

102171456378 is a `hidden beast` number, since 1 + 0 + 2 + 1 + 7 + 1 + 4 + 5 + 637 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (102171456377) 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, 57048 + ... + 455628.

It is an arithmetic number, because the mean of its divisors is an integer number (3658982760).

Almost surely, 2^102171456378 is an apocalyptic number.

102171456378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 102171456378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117087448320).

102171456378 is an abundant number, since it is smaller than the sum of its proper divisors (132003440262).

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

102171456378 is a wasteful number, since it uses less digits than its factorization.

102171456378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398740 (or 398734 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 102171456378 in words is "one hundred two billion, one hundred seventy-one million, four hundred fifty-six thousand, three hundred seventy-eight".