64076872891 has 4 divisors (see below), whose sum is σ = 64079759800. Its totient is φ = 64073985984.

The previous prime is 64076872841. The next prime is 64076872961. The reversal of 64076872891 is 19827867046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64076872891 - 2⁷ = 64076872763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64076872841) 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, 1409901 + ... + 1454638.

It is an arithmetic number, because the mean of its divisors is an integer number (16019939950).

Almost surely, 2^64076872891 is an apocalyptic number.

64076872891 is a deficient number, since it is larger than the sum of its proper divisors (2886909).

64076872891 is a wasteful number, since it uses less digits than its factorization.

64076872891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886908.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 64076872891 in words is "sixty-four billion, seventy-six million, eight hundred seventy-two thousand, eight hundred ninety-one".