1538755477648 has 40 divisors (see below), whose sum is σ = 3084324521400. Its totient is φ = 742803876864.

The previous prime is 1538755477643. The next prime is 1538755477711. The reversal of 1538755477648 is 8467745578351.

It can be written as a sum of positive squares in 4 ways, for example, as 1010563751824 + 528191725824 = 1005268^2 + 726768^2 .

It is a super-2 number, since 2×1538755477648² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1538755477643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8667340 + ... + 8843092.

It is an arithmetic number, because the mean of its divisors is an integer number (77108113035).

Almost surely, 2^{1538755477648} is an apocalyptic number.

It is an amenable number.

1538755477648 is an abundant number, since it is smaller than the sum of its proper divisors (1545569043752).

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

1538755477648 is a wasteful number, since it uses less digits than its factorization.

1538755477648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194659 (or 194653 counting only the distinct ones).

The product of its digits is 790272000, while the sum is 70.

The spelling of 1538755477648 in words is "one trillion, five hundred thirty-eight billion, seven hundred fifty-five million, four hundred seventy-seven thousand, six hundred forty-eight".