64980518971 has 2 divisors, whose sum is σ = 64980518972. Its totient is φ = 64980518970.

The previous prime is 64980518899. The next prime is 64980519001. The reversal of 64980518971 is 17981508946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64980518971 - 2²⁷ = 64846301243 is a prime.

It is not a weakly prime, because it can be changed into another prime (64980518371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32490259485 + 32490259486.

It is an arithmetic number, because the mean of its divisors is an integer number (32490259486).

Almost surely, 2^64980518971 is an apocalyptic number.

64980518971 is a deficient number, since it is larger than the sum of its proper divisors (1).

64980518971 is an equidigital number, since it uses as much as digits as its factorization.

64980518971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 64980518971 in words is "sixty-four billion, nine hundred eighty million, five hundred eighteen thousand, nine hundred seventy-one".