64724121901 has 2 divisors, whose sum is σ = 64724121902. Its totient is φ = 64724121900.

The previous prime is 64724121863. The next prime is 64724121929. The reversal of 64724121901 is 10912142746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60611978025 + 4112143876 = 246195^2 + 64126^2 .

It is a cyclic number.

It is not a de Polignac number, because 64724121901 - 2²⁷ = 64589904173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64724121971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32362060950 + 32362060951.

It is an arithmetic number, because the mean of its divisors is an integer number (32362060951).

Almost surely, 2^64724121901 is an apocalyptic number.

It is an amenable number.

64724121901 is a deficient number, since it is larger than the sum of its proper divisors (1).

64724121901 is an equidigital number, since it uses as much as digits as its factorization.

64724121901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 64724121901 in words is "sixty-four billion, seven hundred twenty-four million, one hundred twenty-one thousand, nine hundred one".