1536994939536 has 135 divisors (see below), whose sum is σ = 5004067900611. Its totient is φ = 439111657152.

The previous prime is 1536994939451. The next prime is 1536994939549. The reversal of 1536994939536 is 6359394996351.

It is a happy number.

The square root of 1536994939536 is 1239756.

It is a perfect power (a square), and thus also a powerful number.

1536994939536 is a `hidden beast` number, since 1 + 5 + 369 + 94 + 93 + 95 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 104132125 + ... + 104146883.

Almost surely, 2^{1536994939536} is an apocalyptic number.

1536994939536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1536994939536 is the 1239756-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1536994939536

1536994939536 is an abundant number, since it is smaller than the sum of its proper divisors (3467072961075).

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

1536994939536 is an frugal number, since it uses more digits than its factorization.

1536994939536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29546 (or 14771 counting only the distinct ones).

The product of its digits is 637729200, while the sum is 72.

The spelling of 1536994939536 in words is "one trillion, five hundred thirty-six billion, nine hundred ninety-four million, nine hundred thirty-nine thousand, five hundred thirty-six".