2696381721 has 12 divisors (see below), whose sum is σ = 4248844080. Its totient is φ = 1634170680.

The previous prime is 2696381711. The next prime is 2696381729. The reversal of 2696381721 is 1271836962.

2696381721 is a `hidden beast` number, since 2 + 6 + 9 + 638 + 1 + 7 + 2 + 1 = 666.

It is not a de Polignac number, because 2696381721 - 2⁶ = 2696381657 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2696381729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13617991 + ... + 13618188.

It is an arithmetic number, because the mean of its divisors is an integer number (354070340).

Almost surely, 2^2696381721 is an apocalyptic number.

It is an amenable number.

2696381721 is a deficient number, since it is larger than the sum of its proper divisors (1552462359).

2696381721 is a wasteful number, since it uses less digits than its factorization.

2696381721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27236196 (or 27236193 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 2696381721 is about 51926.6956487701. The cubic root of 2696381721 is about 1391.8543511526.

The spelling of 2696381721 in words is "two billion, six hundred ninety-six million, three hundred eighty-one thousand, seven hundred twenty-one".