15785785487136 has 192 divisors, whose sum is σ = 47933745850368. Its totient is φ = 4455343423488.

The previous prime is 15785785487107. The next prime is 15785785487149. The reversal of 15785785487136 is 63178458758751.

15785785487136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 763953541 + ... + 763974203.

It is an arithmetic number, because the mean of its divisors is an integer number (249654926304).

Almost surely, 2^{15785785487136} is an apocalyptic number.

15785785487136 is a gapful number since it is divisible by the number (16) 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 15785785487136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23966872925184).

15785785487136 is an abundant number, since it is smaller than the sum of its proper divisors (32147960363232).

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

15785785487136 is a wasteful number, since it uses less digits than its factorization.

15785785487136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34463 (or 34455 counting only the distinct ones).

The product of its digits is 1580544000, while the sum is 75.

The spelling of 15785785487136 in words is "fifteen trillion, seven hundred eighty-five billion, seven hundred eighty-five million, four hundred eighty-seven thousand, one hundred thirty-six".