64546876471861 has 8 divisors (see below), whose sum is σ = 73932152500800. Its totient is φ = 55202673861888.

The previous prime is 64546876471859. The next prime is 64546876471901. The reversal of 64546876471861 is 16817467864546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64546876471861 - 2¹ = 64546876471859 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 (64546876471841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10268351371 + ... + 10268357656.

It is an arithmetic number, because the mean of its divisors is an integer number (9241519062600).

Almost surely, 2^{64546876471861} is an apocalyptic number.

It is an amenable number.

64546876471861 is a deficient number, since it is larger than the sum of its proper divisors (9385276028939).

64546876471861 is a wasteful number, since it uses less digits than its factorization.

64546876471861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20536709483.

The product of its digits is 1300561920, while the sum is 73.

The spelling of 64546876471861 in words is "sixty-four trillion, five hundred forty-six billion, eight hundred seventy-six million, four hundred seventy-one thousand, eight hundred sixty-one".