2137646381 has 16 divisors (see below), whose sum is σ = 2415504000. Its totient is φ = 1876944960.

The previous prime is 2137646377. The next prime is 2137646387. The reversal of 2137646381 is 1836467312.

It is a cyclic number.

It is not a de Polignac number, because 2137646381 - 2² = 2137646377 is a prime.

It is a super-2 number, since 2×2137646381² = 9139064100404794322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2137646387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34370 + ... + 73868.

It is an arithmetic number, because the mean of its divisors is an integer number (150969000).

Almost surely, 2^2137646381 is an apocalyptic number.

It is an amenable number.

2137646381 is a deficient number, since it is larger than the sum of its proper divisors (277857619).

2137646381 is a wasteful number, since it uses less digits than its factorization.

2137646381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39716.

The product of its digits is 145152, while the sum is 41.

The square root of 2137646381 is about 46234.6880707548. The cubic root of 2137646381 is about 1288.1861375101.

The spelling of 2137646381 in words is "two billion, one hundred thirty-seven million, six hundred forty-six thousand, three hundred eighty-one".