64154034221 has 4 divisors (see below), whose sum is σ = 64338916512. Its totient is φ = 63969151932.

The previous prime is 64154034173. The next prime is 64154034247. The reversal of 64154034221 is 12243045146.

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.

It is a cyclic number.

It is not a de Polignac number, because 64154034221 - 2¹⁸ = 64153772077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64154034271) 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, 92440625 + ... + 92441318.

It is an arithmetic number, because the mean of its divisors is an integer number (16084729128).

Almost surely, 2^64154034221 is an apocalyptic number.

It is an amenable number.

64154034221 is a deficient number, since it is larger than the sum of its proper divisors (184882291).

64154034221 is a wasteful number, since it uses less digits than its factorization.

64154034221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184882290.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 64154034221 its reverse (12243045146), we get a palindrome (76397079367).

The spelling of 64154034221 in words is "sixty-four billion, one hundred fifty-four million, thirty-four thousand, two hundred twenty-one".