1538078066880 has 448 divisors, whose sum is σ = 5153520360960. Its totient is φ = 388106256384.

The previous prime is 1538078066873. The next prime is 1538078066939. The reversal of 1538078066880 is 886608708351.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 331265839 + ... + 331270481.

Almost surely, 2^{1538078066880} is an apocalyptic number.

1538078066880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1538078066880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2576760180480).

1538078066880 is an abundant number, since it is smaller than the sum of its proper divisors (3615442294080).

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

1538078066880 is a wasteful number, since it uses less digits than its factorization.

1538078066880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4928 (or 4918 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 60.

The spelling of 1538078066880 in words is "one trillion, five hundred thirty-eight billion, seventy-eight million, sixty-six thousand, eight hundred eighty".