2135731656 has 64 divisors (see below), whose sum is σ = 5494648320. Its totient is φ = 691361280.

The previous prime is 2135731643. The next prime is 2135731667. The reversal of 2135731656 is 6561375312.

It is a super-2 number, since 2×2135731656² = 9122699412881004672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214566 + ... + 224298.

It is an arithmetic number, because the mean of its divisors is an integer number (85853880).

Almost surely, 2^2135731656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2135731656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2747324160).

2135731656 is an abundant number, since it is smaller than the sum of its proper divisors (3358916664).

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

2135731656 is a wasteful number, since it uses less digits than its factorization.

2135731656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006 (or 10002 counting only the distinct ones).

The product of its digits is 113400, while the sum is 39.

The square root of 2135731656 is about 46213.9768468371. The cubic root of 2135731656 is about 1287.8014061181.

The spelling of 2135731656 in words is "two billion, one hundred thirty-five million, seven hundred thirty-one thousand, six hundred fifty-six".