64724121929 has 2 divisors, whose sum is σ = 64724121930. Its totient is φ = 64724121928.

The previous prime is 64724121901. The next prime is 64724121937. The reversal of 64724121929 is 92912142746.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64555121929 + 169000000 = 254077^2 + 13000^2 .

It is a cyclic number.

It is not a de Polignac number, because 64724121929 - 2⁸ = 64724121673 is a prime.

It is not a weakly prime, because it can be changed into another prime (64724121529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32362060964 + 32362060965.

It is an arithmetic number, because the mean of its divisors is an integer number (32362060965).

Almost surely, 2^64724121929 is an apocalyptic number.

It is an amenable number.

64724121929 is a deficient number, since it is larger than the sum of its proper divisors (1).

64724121929 is an equidigital number, since it uses as much as digits as its factorization.

64724121929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The spelling of 64724121929 in words is "sixty-four billion, seven hundred twenty-four million, one hundred twenty-one thousand, nine hundred twenty-nine".