64084134921 has 16 divisors (see below), whose sum is σ = 87987852288. Its totient is φ = 41462499200.

The previous prime is 64084134911. The next prime is 64084134931. The reversal of 64084134921 is 12943148046.

It is an interprime number because it is at equal distance from previous prime (64084134911) and next prime (64084134931).

It is a cyclic number.

It is not a de Polignac number, because 64084134921 - 2²³ = 64075746313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64084134911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1340406 + ... + 1387391.

It is an arithmetic number, because the mean of its divisors is an integer number (5499240768).

Almost surely, 2^64084134921 is an apocalyptic number.

It is an amenable number.

64084134921 is a deficient number, since it is larger than the sum of its proper divisors (23903717367).

64084134921 is a wasteful number, since it uses less digits than its factorization.

64084134921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728032.

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 64084134921 in words is "sixty-four billion, eighty-four million, one hundred thirty-four thousand, nine hundred twenty-one".