6499878941 has 4 divisors (see below), whose sum is σ = 6546640800. Its totient is φ = 6453117084.

The previous prime is 6499878919. The next prime is 6499878947. The reversal of 6499878941 is 1498789946.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1498789946 = 2 ⋅749394973.

It is a cyclic number.

It is not a de Polignac number, because 6499878941 - 2⁶ = 6499878877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6499878947) 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, 23380721 + ... + 23380998.

It is an arithmetic number, because the mean of its divisors is an integer number (1636660200).

Almost surely, 2^6499878941 is an apocalyptic number.

It is an amenable number.

6499878941 is a deficient number, since it is larger than the sum of its proper divisors (46761859).

6499878941 is a wasteful number, since it uses less digits than its factorization.

6499878941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46761858.

The product of its digits is 31352832, while the sum is 65.

The square root of 6499878941 is about 80621.8267034430. The cubic root of 6499878941 is about 1866.2439923349.

The spelling of 6499878941 in words is "six billion, four hundred ninety-nine million, eight hundred seventy-eight thousand, nine hundred forty-one".