6940005641 has 4 divisors (see below), whose sum is σ = 6967009812. Its totient is φ = 6913001472.

The previous prime is 6940005637. The next prime is 6940005643. The reversal of 6940005641 is 1465000496.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3042625600 + 3897380041 = 55160^2 + 62429^2 .

It is a cyclic number.

It is not a de Polignac number, because 6940005641 - 2² = 6940005637 is a prime.

It is a super-2 number, since 2×6940005641² = 96327356594223641762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6940005643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13501700 + ... + 13502213.

It is an arithmetic number, because the mean of its divisors is an integer number (1741752453).

Almost surely, 2^6940005641 is an apocalyptic number.

It is an amenable number.

6940005641 is a deficient number, since it is larger than the sum of its proper divisors (27004171).

6940005641 is a wasteful number, since it uses less digits than its factorization.

6940005641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27004170.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 6940005641 is about 83306.6962554632. The cubic root of 6940005641 is about 1907.4504913612.

The spelling of 6940005641 in words is "six billion, nine hundred forty million, five thousand, six hundred forty-one".