6540034621 has 4 divisors (see below), whose sum is σ = 6544231200. Its totient is φ = 6535838044.

The previous prime is 6540034607. The next prime is 6540034637. The reversal of 6540034621 is 1264300456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6540034621 - 2³¹ = 4392550973 is a prime.

It is a super-2 number, since 2×6540034621² = 85544105687757227282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540034601) 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, 2095951 + ... + 2099068.

It is an arithmetic number, because the mean of its divisors is an integer number (1636057800).

Almost surely, 2^6540034621 is an apocalyptic number.

It is an amenable number.

6540034621 is a deficient number, since it is larger than the sum of its proper divisors (4196579).

6540034621 is a wasteful number, since it uses less digits than its factorization.

6540034621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4196578.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 6540034621 is about 80870.4805290534. The cubic root of 6540034621 is about 1870.0792688523.

The spelling of 6540034621 in words is "six billion, five hundred forty million, thirty-four thousand, six hundred twenty-one".