6542561545 has 32 divisors (see below), whose sum is σ = 8617819392. Its totient is φ = 4739288832.

The previous prime is 6542561533. The next prime is 6542561549. The reversal of 6542561545 is 5451652456.

It is a cyclic number.

It is not a de Polignac number, because 6542561545 - 2¹⁵ = 6542528777 is a prime.

It is a super-2 number, since 2×6542561545² = 85610223140225574050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6542561549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 711799 + ... + 720931.

It is an arithmetic number, because the mean of its divisors is an integer number (269306856).

Almost surely, 2^6542561545 is an apocalyptic number.

6542561545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6542561545 is a deficient number, since it is larger than the sum of its proper divisors (2075257847).

6542561545 is a wasteful number, since it uses less digits than its factorization.

6542561545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9361.

The product of its digits is 720000, while the sum is 43.

The square root of 6542561545 is about 80886.1022982317. The cubic root of 6542561545 is about 1870.3200901922.

The spelling of 6542561545 in words is "six billion, five hundred forty-two million, five hundred sixty-one thousand, five hundred forty-five".