6542379861 has 16 divisors (see below), whose sum is σ = 8804334528. Its totient is φ = 4321116800.

The previous prime is 6542379817. The next prime is 6542379863. The reversal of 6542379861 is 1689732456.

It is a cyclic number.

It is not a de Polignac number, because 6542379861 - 2¹⁰ = 6542378837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6542379863) 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, 228991 + ... + 255971.

It is an arithmetic number, because the mean of its divisors is an integer number (550270908).

Almost surely, 2^6542379861 is an apocalyptic number.

It is an amenable number.

6542379861 is a deficient number, since it is larger than the sum of its proper divisors (2261954667).

6542379861 is a wasteful number, since it uses less digits than its factorization.

6542379861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27732.

The product of its digits is 2177280, while the sum is 51.

The square root of 6542379861 is about 80884.9792050415. The cubic root of 6542379861 is about 1870.3027773819.

The spelling of 6542379861 in words is "six billion, five hundred forty-two million, three hundred seventy-nine thousand, eight hundred sixty-one".