3136787856 has 90 divisors (see below), whose sum is σ = 9116131622. Its totient is φ = 1045560960.

The previous prime is 3136787851. The next prime is 3136787867. The reversal of 3136787856 is 6587876313.

It can be written as a sum of positive squares in only one way, i.e., 2087027856 + 1049760000 = 45684^2 + 32400^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (3136787851) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 90036 + ... + 119916.

Almost surely, 2^3136787856 is an apocalyptic number.

3136787856 is a gapful number since it is divisible by the number (36) 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 3136787856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4558065811).

3136787856 is an abundant number, since it is smaller than the sum of its proper divisors (5979343766).

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

3136787856 is an frugal number, since it uses more digits than its factorization.

3136787856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29913 (or 29886 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 3136787856 is about 56007.0339868128. The cubic root of 3136787856 is about 1463.8448505296.

The spelling of 3136787856 in words is "three billion, one hundred thirty-six million, seven hundred eighty-seven thousand, eight hundred fifty-six".