64021542523 has 2 divisors, whose sum is σ = 64021542524. Its totient is φ = 64021542522.

The previous prime is 64021542493. The next prime is 64021542527. The reversal of 64021542523 is 32524512046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64021542523 - 2²⁵ = 63987988091 is a prime.

It is not a weakly prime, because it can be changed into another prime (64021542527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32010771261 + 32010771262.

It is an arithmetic number, because the mean of its divisors is an integer number (32010771262).

Almost surely, 2^64021542523 is an apocalyptic number.

64021542523 is a deficient number, since it is larger than the sum of its proper divisors (1).

64021542523 is an equidigital number, since it uses as much as digits as its factorization.

64021542523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 34.

The spelling of 64021542523 in words is "sixty-four billion, twenty-one million, five hundred forty-two thousand, five hundred twenty-three".