1538994047616 has 48 divisors (see below), whose sum is σ = 4428615687210. Its totient is φ = 512998015488.

The previous prime is 1538994047581. The next prime is 1538994047629. The reversal of 1538994047616 is 6167404998351.

1538994047616 is a `hidden beast` number, since 1 + 5 + 3 + 8 + 9 + 9 + 4 + 0 + 4 + 7 + 616 = 666.

It can be written as a sum of positive squares in only one way, i.e., 887590094400 + 651403953216 = 942120^2 + 807096^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667965015 + ... + 667967318.

Almost surely, 2^{1538994047616} is an apocalyptic number.

1538994047616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1538994047616 is an abundant number, since it is smaller than the sum of its proper divisors (2889621639594).

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

1538994047616 is a wasteful number, since it uses less digits than its factorization.

1538994047616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335932353 (or 1335932338 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 1538994047616 in words is "one trillion, five hundred thirty-eight billion, nine hundred ninety-four million, forty-seven thousand, six hundred sixteen".